TY - BOOK AU - Hussey,Russell C. TI - The Middle and Upper Ordovician rocks of Michigan T2 - Michigan. Dept. of Conservation. Geological Survey Division. Publication 46. Geological series, AV - QE125 .A4 no. 39 U1 - 551.72551.731 PY - 1952/// CY - Lansing KW - Geology, Stratigraphic KW - Ordovician KW - Geology KW - Michigan KW - Paleontology KW - Petrology N1 - "A completion of a report written by Professor Hussey and published as a part of Geological Survey Publication 40, Geological series, 34."; "Published as a part of the Biennial report of the Geological Survey Division in 1952."; Bibliography: p. 67 ER -