TY  - BOOK
AU  - Simpson,Howard Edwin
TI  - Geology of the Yankton area, South Dakota and Nebraska
AV  - QE75 .P9 no. 328
U1  - 557.82 
PY  - 1960///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Geology
KW  - South Dakota
KW  - Nebraska
N1  - Part of illustrative matter in pocket; Prepared as part of the program of the Dept. of the Interior for the development of the Missouri River Basin; Bibliography: p. 118-121
ER  -