Online Books by
Donald L. Graf
(Graf, Donald L. (Donald Lee))
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Graf, Donald L. (Donald Lee): Carbonate mineralogy carbonate sediments (State of Illinois, Dept. of Registration and Education, Division of the State Geological Survey, 1960), also by Illinois State Geological Survey (page images at HathiTrust)- Graf, Donald L. (Donald Lee): Preliminary report on the variations in differential thermal curves of low-iron dolomites. (Urbana, 1952) (page images at HathiTrust)
- Graf, Donald L. (Donald Lee): Sedimentary carbonate rocks. (State of Illinois, Dept. of Registration and Education, Division of the State Geological Survey, 1960), also by Illinois State Geological Survey (page images at HathiTrust)
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