Bulletin of the Geological Society of America. V.70 Bull. Geol. Soc. Am. Geological Society of America. Geology Periodicals. QE1 .G2 551 19 GEB Title from caption. Vols. for 1890-<1891> have no numbering, but constitute v. 1, no. 1- Vols. 1 (1890)-10 (1900); Vols. 11 (1900)-20 (1909); Vols. 21 (1910)-30 (1919?); Vols. 31 (1920)-50 (1939); Vols. 51 (1940)-60 (1949); Vols. 61 (1950)-70 (1959). An index is issued every 10 years for the preceedings 10 vols. Vols. 1-44 include Proceedings of the annual meeting, 1889-1933, later published separately. SERBIB/SERLOC merged record [New York : Geological Society of America], 1890-1960. 1890-1960. 1890 Text Collection (229-379) p. : eng Geological Society of America bulletin Bulletin of the Geological Society of America (Online) Also issued online. Bulletin of the Geological Society of America (Online) Also issued online.