TY - BOOK AU - Kupsch W O ed. ED - Symposium on History of Concepts in Precambrian Geology (1972 : Montreal) ED - TI - History of concepts in Precambrian Geology: proceedings U1 - 551.71 PY - 1979/// CY - Canada PB - Geological Association of Canada KW - Archeozoic era KW - Precambrian geology ER -