TY  - GEN
AU  - Thomson, Betty Flanders
TI  - (The) shaping of America's heartland : the landscape of the Middle West
AV  - GB 428
PY  - 1977///
PB  - Houghton Mifflin
KW  - Landforms - Middle West
KW  - Plant ecology - Middle West
KW  - Hydrology - Middle West
N1  - 29868
ER  -