1968 288 p., 3 figs, 12 pls, paperbound. Bull. American Pal.
1962 672 p., 48 plates with explanatory text leaves. paperbound.This extensive work does include new and poorly known Pliocene, Pleistocene and recent gastropods (the latter inclusion being a little known fact) including many not usually treated in other works. The work has an unusual extensive detailed list of references. Very useful. Old owner's signature on front wrapper, otherwise a good copy.
1967 247 / 240 p., 56 figs, 12 / 33 pls, new blue cloth, gilt title on the spine.Complete volume 53 of the Bulletins of American Paleontology with these two large papers.