| Call number | Item |
| H | Social Sciences (Go to start of category) |
| HB-HJ | Economics and Business (Go to start of category) |
| HE | Transportation and Communications (Go to start of category) |
| HE5614.2 .E93 2004 | ![[Info]](https://onlinebooks.library.upenn.edu/info.gif) Traffic Safety (2004), by Leonard Evans (HTML at scienceservingsociety.com) |
| HE5614.2 .G4 1988 | Gearing Up for Safety: Motor Carrier Safety in a Competitive Environment (1988), by United States Congress Office of Technology Assessment |
| HE5623 .F814 1984 | An Economic Analysis of Taxicab Regulation (FTC Bureau of Economics staff report, 1984), by Mark W. Frankena and Paul A. Pautler (page images at HathiTrust) |
| HE5623 .H68 | Motor Transportation: Principles and Practices (New York: Ronald Press Co., c1958), by William James Hudson and James A. Constantin (page images at HathiTrust) |
| HE5633 .M5 A5 | What Every Driver Must Know, by Michigan Department of State (PDF at michigan.gov) |
| HE5663 .A4 1920 | Departmental Committee on Taxation and Regulation of Road Vehicles in Great Britain and Ireland: Interim Report (London: HMSO, 1920), by Great Britain Ministry of Transport (page images at HathiTrust) |
| HE5691 .B3 G67 2020 | Installing Automobility: Emerging Politics of Mobility and Streets in Indian Cities (open access edition; Cambridge, MA: MIT Press, 2020), by Govind Gopakumar (PDF files at MIT Press) |
| HE5737 .B53 | Bicycling and Walking in the United States: Benchmarking Report, by Alliance for Biking & Walking (full serial archives) |
| HE5898 .B4 | The Express Companies of the United States: A Study of a Public Utility (New York: Intercollegiate Socialist Society, 1919), by Bertram Benedict, contrib. by Harry W. Laidler |
| HE6185 .U5 C5 1942 | The 3c Stamp of the United States 1851-1857 Issue (revised edition; Springfield, MA: Tatham Stamp and Coin Co, c1942), by Carroll Chase (page images at HathiTrust) |
| HE6187 .A6 | The American Philatelist (partial serial archives) |
| HE6187 .M5 | Mekeel's Weekly Stamp News (partial serial archives) |
| HE6196 .K6 | American Philatelic Dictionary, and Colonial and Revolutionary Posts (New York: J. Minkus, c1947), by Harry M. Konwiser (page images at HathiTrust) |
| HE6196 .S85 1955 | The Stamp Collector's Encyclopedia (fourth edition; New York: Philosophical Library, 1955), ed. by R. J. Sutton (page images at HathiTrust) |
| HE6213 .M5 1920 | Chats on Postage Stamps (second impression; London: T. F. Unwin, 1920), by Frederick John Melville (multiple formats at archive.org) |
| HE6239 .E54 I46 1982 | Implications of Electronic Mail and Message Systems for the U.S. Postal Service (1982), by United States Congress Office of Technology Assessment (PDF files at Princeton) |
| HE6239.E54 S5 1985 | Toward an Ethics and Etiquette for Electronic Mail (1985), by Norman Z. Shapiro and Robert H. Anderson (HTML and PDF with commentary at rand.org) |
| HE6239 .E54 U55 | Universal Access to E-Mail: Feasibility and Societal Implications (1995), by Robert H. Anderson, Tora K. Bikson, Sally Ann Law, and Bridger M. Mitchell (HTML at rand.org) |
| HE6366 .A3 | List of Post Offices in the United States (1859), by United States Post Office Department (page images at MOA) |
| HE6371 .H72 | Ten Years Among the Mail Bags (Philadelphia: H. Cowperthwait and Co., 1855), by James Holbrook (page images at MOA) |
| HE6375 .A3 | Report to Hon. A. V. Brown, Postmaster-General, on the Opening and Present Condition of the United States Overland Mail Route Between San Antonio, Texas, and San Diego, California, by Isaiah Churchill Woods (page images at MOA) |
| HE6375 .B8 | The Story of the Pony Express: An Account of the Most Remarkable Mail Service Ever in Existence, and Its Place in History, by Glenn D. Bradley (Gutenberg text) |
| HE6424 .T45 | Lotteries, Frauds and Obscenity in the Mails (Columbia, MO: Press of E. W. Stephens, 1900), by John Lilburn Thomas (multiple formats at archive.org) |
| HE6477 .A15 1850 | Report of the Naval Committee to the House of Representatives, August, 1850, In Favor of the Establishment of a Line of Mail Steamships to the Western Coast of Africa, and Thence Via the Mediterranean to London (Washington: Gideon and Co., 1850), by United States House Committee on Naval Affairs |
| HE6500 .A3 1864 | Correspondence Between the President of the Virginia Central Rail Road Company and the Postmaster General, in Relation to Postal Services (Richmond, VA: Printed by Ritchie and Dunnavant, 1864), by Virginia Central Railroad Company |