共 17 条
[1]
BROOKS WP, 1914, MASS AGR EXP STA, V44
[2]
CRAIB IJ, 1929, YALE U SCH FORESTRY, V25
[3]
FERNALD ML, 1919, RHODORA, V21, P41
[5]
Harshberger JW., 1916, VEGETATION NEW JERSE
[6]
HAZARD HE, 1936, N H AGR EXP STA B, V2
[7]
HICOCK HWE, 1931, CONN NEW HAVEN AGR E
[8]
Hilgard E.W., 1906, SOILS
[9]
KEARNAY THE, 1914, UTAH J AGR RES, V1, P365
[10]
LYON TL, 1920, SOILS