@book{ 0-1336274689, title = {The base of the upper Keweenawan, Michigan and Wisconsin}, series = {Contributions to stratigraphy}, author = {White, Walter Stanley}, address = {Washington}, publisher = {United States Government Printing Office}, year = {1972}, language = {English}, url = {https://katalog.ub.tu-freiberg.de/Record/0-1336274689} }