1919-1995 By several author's like: Leloup, Kaas, Berry, Buckland-Nicks, Wu, Sirenko, Salvini-Plawen, Smith etc. Including papers like: Leloup, Caractères anatomiques de certain Chitons de la côte Californienne (41 p., 94 figs) / Salvini-Plawen, Neue Formen im marinen Mesopsammon: Kamptozoa und Aculifera (42 p., 17 figs, 9 pls) & Sirenko, Revision of the system of the order Chitonida ...(25 p., 13 figs), etc. We added a few papers in photocopy.