共 7 条
[1]
DAVIES W, 1952, GRASS CROP ITS DEVEL
[2]
MUSSER HB, 1947, J AM SOC AGRON, V39, P335
[3]
ROGLER GA, 1961, USDA YEARBOOK AGRICU, P163
[4]
SPENCER JT, 1949, KENTUCKY AGRIC EXP S, P535
[5]
SPENCER JT, 1950, KENTUCKY AGRIC EXP S, P554
[6]
STELFOX H. B., 1954, CANADIAN JOUR AGRIC SCI, V34, P28
[7]
WHEELER WA, 1957, GRASSLAND SEEDS