Geological bulletin.

no.12-17 1935-1939; no.18-22 (1939-41); no.18-20,22 1939-1941; no.26 1944; no.28 1945; no.31 1947; no.32 1948; no.33 (1951); no.34 (1951); no.35 (1953); no.36 (1953); no.37 1955; no.38 (1957); no.39 (1957); no.40 (1958); no.41 (1958); no.42 (1961); no.43 (1962); no.44 (1964); no.45-49 (1965-67); no.50 1969; no.50-53 (1969-70); no.51 1970; no.52 1970; no.31a (1977); no.31 (1977); v.18-20(1939-1942); no.15-18; no.19-23; no.31(rev) 1977; no.31; no.37; no.43; no.45-48; no.45-50; no.49-50