共 19 条
[1]
Adams C.C, 1902, J GEOGR, V1, P303
[3]
ADAMS CC, 1919, AM NAT, V53
[4]
ADAMS CC, 1918, AM NAT, V52
[5]
BONNER G, 1914, MONDE VEGETAL
[6]
BRIGGS, 1916, J AGR RES, V5, P584
[7]
COLVIN V, 1880, 7 TOP SURV AD REG NE
[8]
Garner WW., 1920, J AGR RES, VXVII, P553
[9]
HART MC, 1894, NAT GEOG MAG, V6, P229
[10]
KEMP, 1910, B NY STATE MUSEUM, V138, P32