THE ENCYCLOPEDIA OF THE ENVIRONMENT
EBLEN, RUTH A. AND WILLIAM R. EBLEN, EDS.
THE ENCYCLOPEDIA OF THE ENVIRONMENT THE RENE DUBOS CENTER FOR HUMAN ENVIRONMENTS, INC. - BOSTON HOUGHTON MIFFLIN 1994
ENVIRONMENTAL SCIENCES--ENCYCLOPEDIAS
THE ENCYCLOPEDIA OF THE ENVIRONMENT THE RENE DUBOS CENTER FOR HUMAN ENVIRONMENTS, INC. - BOSTON HOUGHTON MIFFLIN 1994
ENVIRONMENTAL SCIENCES--ENCYCLOPEDIAS