Caring for the earth

গ্রন্থ-পঞ্জীর বিবরন
সংস্থা লেখক:	International Union for Conservation of Nature and Natural Resources, United Nations Environment Programme, World Wide Fund for Nature
বিন্যাস:	গ্রন্থ
ভাষা:	English
প্রকাশিত:	Gland, Switzerland IUCN--the World Conservation Union United Nations Environment Programme World Wide Fund for Nature c1991.
বিষয়গুলি:	Human ecology. Sustainable development. Nature conservation.