共 12 条
[1]
BOSMA WA, 1946, ONTWIKKELINGSDAG MAR
[2]
DIBBITS HC, 1874, Z ANAL CHEM, V13, P395
[3]
GEERTS JM, 1916, ARCH SUIKERIND, V24, P929
[4]
HARMSEN G. W., 1935, Landbouwkundig Tijdschrift, V47, P852
[6]
Kappen H., 1943, BODENK U PFLANZENERNAHR, V31, P223
[7]
SCHNEIDEWIND W, 1928, ERNAHRUNG LANDWIRTSC, P81
[8]
SMEDING S., 1935, Landbouwkundig Tijdschrift, V47, P797
[9]
STEENBJERG F, 1942, TIDS PLANTEAVL, V48, P516
[10]
TOVBORG JS, 1948, TIDS PLANTEAVL, V51, P666