共 15 条
[11]
Rydberg P. A., 1932, FLORA PRAIRIES PLAIN, P829
[12]
Shreve F., 1931, CACTUS ITS HOME
[13]
TIMMONS FL, 1940, KANSAS FARMER, V77, P22
[14]
TIMMONS FL, 1940, KANS FARMER, V77, P5