共 55 条
[1]
BENT AM, 1963, GEOL SOC AM BULL, V74, P491, DOI 10.1130/0016-7606(1963)74[491:PAOSMA]2.0.CO
[2]
2
[3]
BURZLAFF DF, 1962, 206 U NEBR AGR EXP S
[4]
BUTTRICK PL, 1914, FOREST QUART, V12, P223
[6]
CUSHING EJ, 1963, THESIS U MINNESOTA
[7]
DEEVEY ES, 1949, GEOL SOC AM BULL, V60, P1315, DOI 10.1130/0016-7606(1949)60[1315:BOTP]2.0.CO
[8]
2
[9]
Erdtman G., 1957, POLLEN MORPHOLOGY PL
[10]
FAEGRI K, 1964, TEXTBOOK POLLEN ANAL