共 22 条
[1]
ARONOW S, 1955, THESIS U WISCONSIN
[2]
CHARLESWORTH JK, 1957, QUATERNARY ERA, V1
[3]
COLTON RB, 1955, GEOL SOC AM BULL, V66, P1673
[5]
EASKER DG, 1949, N DAK SURVEY B, V24
[6]
FENNEMAN NM, 1938, PHYSIOGRAPHY EASTERN
[7]
Flint R.F., 1957, GLACIAL PLEISTOCENE
[8]
FLINT RF, 1955, 262 US GEOL SURV PRO
[10]
Hoppe G., 1953, GEOGR ANN, V35, P105, DOI DOI 10.1080/20014422.1953.11880852