Biological indicators in environmental protection
edited by Margit Kovacs
Ellis Horwood, 1992
 Buku Teks
Mickelburgh, John
Consumer protection / John Mickleburgh
Profesional Books, 1979
 Buku Teks
Development of environmental protection in Japan
Ministry of Foreign Affairs, Japan, 1974
 Buku Teks
Epstein, David G., author
Consumer protection in a nut shell
West Publishing Company, 1976
 Buku Teks
Consumer protection : gains and setbacks
editor, Hoyt Gimlin
Congressional Quarterly, 1978
 Buku Teks
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