共 61 条
[1]
[Anonymous], 1855, BANNATYNE MISCELLANY, V3
[2]
BELL A, 1789, PARKER PAPERS
[3]
Bromley S.W., 1935, ECOL MONOGR, V5, P61
[4]
BROTAK EA, 1973, B NEW JERSEY ACAD SC, V18, P39
[8]
DUNLAP DV, 1967, CLIMATE US 1974, V1
[9]
EBY CF, 1976, US DEP AGR SOIL CONS
[10]
FERGUSON RH, 1974, NE34 US FOR SERV RES