Physical features of the state of South Dakota / State Geological Survey, Vermillion, S.D., 1947 ; compiled and drafted by Bruno C. Petsch, Helen C. Lockwood.
MLA
Petsch, Bruno C. (Bruno Carl), 1901-. Physical features of the state of South Dakota / State Geological Survey, Vermillion, S.D., 1947 ; compiled and drafted by Bruno C. Petsch, Helen C. Lockwood.. BRBL_00569. [1947]. https://collections.library.yale.edu/catalog/15814755.
APA, 6th edition
Petsch, Bruno C. (Bruno Carl), 1901-. (["BRBL_00569"])([1947])[Physical features of the state of South Dakota / State Geological Survey, Vermillion, S.D., 1947 ; compiled and drafted by Bruno C. Petsch, Helen C. Lockwood.]. https://collections.library.yale.edu/catalog/15814755.
