The first one hundred years of American geology,
by George P. Merrill ...
APA Citation
Merrill, G. P. (George Perkins)., Philip Hamilton McMillan Memorial Publication Fund. (1924). The first one hundred years of American geology. New Haven: Yale university press; [etc., etc.].
MLA Citation
Merrill, George P. (George Perkins), 1854-1929, and Philip Hamilton McMillan Memorial Publication Fund. The First One Hundred Years of American Geology. New Haven: Yale university press; [etc., etc.], 1924.
Warning: These citations may not always be complete (especially for serials).