共 26 条
[3]
Crampton EW, 1938, J NUTR, V15, P383
[4]
EPLEY RR, 1968, THESIS IOWA STATE U
[5]
FISHER LJ, 1963, CLIN CHEM, V9, P573
[7]
HARRIS CE, 1963, BRIT GRASSLAND SOC J, V18, P204
[9]
LEWIS D., 1957, Journal of Agricultural Science, V48, P438, DOI 10.1017/S0021859600032962