Geology of Allegan county,
Riggs, Calvin Harold, 1905-
Geology of Allegan county, by C. H. Riggs. - [Lansing] 1938. - 29numb. 1. incl. tables. 8 fold. maps, 5 fold. plans. 28 cm. - Michigan. Dept. of Conservation. Geological survey division. Progress report, no. 4 .
cover-title. At head of title: State of Michigan. Department of conservation ... Geological survey division. Photoprinted. Folded maps and plans in pocket.
gs 39000104
Geology--Michigan--Allegan County.
TN24.M5 / A34 no. 4
553/.09774
Geology of Allegan county, by C. H. Riggs. - [Lansing] 1938. - 29numb. 1. incl. tables. 8 fold. maps, 5 fold. plans. 28 cm. - Michigan. Dept. of Conservation. Geological survey division. Progress report, no. 4 .
cover-title. At head of title: State of Michigan. Department of conservation ... Geological survey division. Photoprinted. Folded maps and plans in pocket.
gs 39000104
Geology--Michigan--Allegan County.
TN24.M5 / A34 no. 4
553/.09774