Bulletin of the Geological Society of America 21-30
Book digitized by Google and uploaded to the Internet Archive by user tpb. 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
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