共 28 条
[1]
Anthony S, 1919, J AGRIC RES, V18, P0525
[6]
BRINK RA, 1924, AM J BOT, V2, P208
[7]
Calvin M, 1949, ISOTOPIC CARBON TECH
[8]
DENGLER A., 1939, ZEITSCHR FORST U JAGDW, V71, P1
[9]
DOROSHENKO A. V., 1928, BULL APPL BOT GEN & PLANT BREED, V18, P217
[10]
FISHER RA, 1938, STATISTICAL TABLES