AMERICAN GREAT PLAINS

[1] BIRD JB, 1902, 2 ANN CAT ROCKSPR HI

[2] FENNEMAN NM, 1931, PHYSIOGRAPHY WESTERN

[3] HALE R, 1971, THESIS U MINNESOTA

[4] Kraenzel C.F., 1955, GREAT PLAINS TRANSIT, V1st

[5] MEINIG DW, 1969, IMPERIAL TEXAS

[6] Webb Walter Prescott, 1931, GREAT PLAINS

[1] BIRD JB, 1902, 2 ANN CAT ROCKSPR HI

[2] FENNEMAN NM, 1931, PHYSIOGRAPHY WESTERN

[3] HALE R, 1971, THESIS U MINNESOTA

[4] Kraenzel C.F., 1955, GREAT PLAINS TRANSIT, V1st

[5] MEINIG DW, 1969, IMPERIAL TEXAS

[6] Webb Walter Prescott, 1931, GREAT PLAINS