00781nam a2200193Ia 4500 CTU_143959 210402s9999 xx 000 0 und d 581.5 B598 Billings, W. D. Plants and the ecosystem W. D. Billings London MacMillan and Co., Ltd. 1964 This book is an elementary introduction to ecology. Emphasis is given to the relationships of plant individuals and populations to their environments and to their roles in ecosystems. The text is directed to the reader who knows little or nothing about ecology. Plant ecology,Sinh thái học thực vật Giang Trung tâm Học liệu Trường Đại học Cần Thơ