共 4 条
[1]
HARPER RM, 1944, GEOL SURV ALABAMA B, V53
[2]
KEEVER C, 1950, ECOL MONOGR, V20, P229
[3]
OOSTING H. J., 1942, AMER MIDLAND NAT, V28, P1, DOI 10.2307/2420696
[4]
SHINNERS LLOYD H., 1951, FIELD AND LAB, V19, P66