共 16 条
[3]
HANWAY JJ, 1971, 48 IOW COOP EXT SERV
[7]
KVET J, 1971, PLANT PHOTOSYNTHETIC, P344
[9]
Montgomery E.G., 1911, NEB AGR EXP STN ANN, V24, p108?159
[10]
PEARCE R B, 1976, Iowa State Journal of Research, V51, P25