TY  - BOOK
AU  - Jorgensen,Donald G.
AU  - Ackroyd,Earl A.
ED  - East Dakota Conservancy Sub-district (S.D.)
ED  - Sioux Falls (S.D.)
TI  - Water resources of the Big Sioux River valley near Sioux Falls, South Dakota,
U1  - 551.4809783371 
PY  - 1973///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Hydrology
KW  - Big Sioux Valley (S.D. and Iowa)
KW  - Mathematical models
KW  - Data processing
N1  - Part of illustrative matter fold. in pocket; Bibliography: p. 48-50
ER  -