00996cam a22002651 4500 gs 57000152 DLC 20260227111405.0 760224s1956 xx 000 0 eng c gs 57000152 (OCoLC)2011484 U.S. Geol. Survey Libr. NmLcU DLC premarc Z6034.U5 M63 016.557774 Martin, Helen M. (Helen Mandeville), 1889-1973. An index of the geology of Michigan, 1823-1955. [By Helen M. Martin and Muriel Tara Straight. Lansing, Speaker-Hines & Thomas, State printers, 1956] ix, 461 p. maps (part fold.) fold. charts (in separate envelope) 24 cm. Michigan. Geological Survey Division. Publication 50 Includes bibliographies. Michigan. Geological Survey Division Bibliography. Geology Michigan Bibliography. Straight, Muriel Tara, joint author. 29143 29143