共 5 条
[1]
MACLEOD GF, 1937, 13TH P NAT SHAD TREE, P112
[2]
METCALF CL, 1939, DESTRUCTIVE USEFUL I, P694
[3]
PARKER WL, 1947, DEL STA B, V264
[4]
WADLEY FM, 1947, USDA LEAFLET, V161, P1
[5]
WEISS F, 1940, USDA FARMERS B, V1855