共 18 条
[1]
AGRAWAL YK, 1981, J ENV STUDIES, V16, P22
[2]
ALBASEL N, 1971, THESIS STATE U GHENT
[3]
BONDEV I, 1981, EKOLOGIYA, V9, P37
[5]
COTTENIE A, 1967, 7E C AN DIFFR RAYON, P168
[7]
LOW K S, 1979, Pertanika, V2, P105
[10]
MITCHELL RL, 1956, 2 S AN PLANTS PROBL, P249