Pacific Grove, CA, The Western Society of Malacologists, 1968-1987. In 20 volumes. 8vo and 4to (28.0 x 21.7 cm). Numerous pages, several illustrations (shells, meeting participants, etc.). Original pictorial wrappers.
Containing abstracts and proceedings of the annual meetings. A long, continuous run. The first issue is in a 1974 reprint, which is rare too. The name The Echo was dropped after volume six. A very good set.