共 8 条
[1]
ADAM DP, 1974, J RES US GEOL SURV, V2, P727
[2]
BIRKS H J B, 1975, Boreas (Oslo), V4, P77
[6]
LATE-QUATERNARY VEGETATIONAL HISTORY OF WESTERN INTERIOR OF CANADA
[J].
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE,
1976, 54 (15)
:1793-1818
[8]
YARRANTON GA, 1972, POLLEN SPORES, V4, P253