Life support :
Ryan, John C.
Life support : conserving biological diversity / John C. Ryan. - Washington, D.C. : Worldwatch Institute, c1992. - 62 p. ; 22 cm. - Worldwatch paper 108 .
"April 1992."
Includes bibliographical references (p. 50-62).
1878071092
Biodiversity conservation.
Conservation of natural resources.
Life support : conserving biological diversity / John C. Ryan. - Washington, D.C. : Worldwatch Institute, c1992. - 62 p. ; 22 cm. - Worldwatch paper 108 .
"April 1992."
Includes bibliographical references (p. 50-62).
1878071092
Biodiversity conservation.
Conservation of natural resources.