Books by Robert H. Simmons:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Simmons, Robert H. (Robert Harrison): Ruling inks and dyes. ([G.P.O.], 1948), also by United States Government Printing Office and Morris S. Kantrowitz (page images at HathiTrust)
Find more by Robert H. Simmons at your library, or elsewhere.