@book{ Solr-93248, title = {Geology and economic minerals of canada ; B : Chapters 8-13 and index}, series = {Geological Survey of Canada. Economic geology report ;}, author = {Douglas, R. J. W. ;}, editor = {Douglas, R. J. W. ;}, address = {Ottawa}, publisher = {Department of Energy, Mines and Resources}, year = {1976}, edition = {5th ed.}, note = {englisch}, }