共 56 条
[1]
ABERT JW, 1848, 23 SECR WAR SEN EX D
[2]
BEALE EF, 1858, 124 HOUS EX DOC
[4]
BENSON L, 1944, ARIZ U BIOL SCI B, V6
[5]
BOLTON HE, 1916, SPANISH EXPORATIONS
[7]
BRYAN K, 1938, NAT RES COMM REG P 6, P197
[8]
Campbell RS, 1931, J AGRIC RES, V43, P1027
[10]
CANFIELD R. H., 1941, JOUR FOREST, V39, P388