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Greg A. Brick

4 books found

Cover of Caves and Karst of the Upper Midwest, USA

Caves and Karst of the Upper Midwest, USA

Greg A. Brick, E. Calvin Alexander Jr. · First published 2021

Cover of Minnesota caves

Minnesota caves

Greg A. Brick · First published 2017

Cover of Subterranean twin cities

Subterranean twin cities

Greg A. Brick · First published 2009

Cover of Iowa underground

Iowa underground

Greg A. Brick · First published 2004