CÁC CÔNG TRÌNH NGHIÊN CỨU

HQI BAa ve THIEN NHIEN vA MOl TRUONG VieT NAMutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA

VIETNAM ASSOCIATION FOR CONSERVATION

OF NATURE AND ENVIRONMENT

MDI'.',lnrONG

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ENVIRONMENT

cAe eONG TRiNH NGHIEN CUu

RESEARCH WORKS

T~PV

VOLUME V

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SCIENCE AND TECHNICS PUBLISHING HOUSE

HA NQI-1998