共 4 条
[1]
AZZAM R, 1981, RAPG RECLAIMER AMELI
[2]
El-Hady O.A., 1981, 3 INT S WATER SUPPLY, V119, P257, DOI DOI 10.17660/ACTAH0RTIC.1981.119.22
[3]
LOWRY JH, 1976, WORLD POPULATION FOO, P58
[4]
Tayel M.Y., 1981, ACTA HORTIC, V119, P247