Conservation for survival : an ecological strategy /

समान संसाधन

• Conservation activities.
  प्रकाशित: (1965)
• Environmental conservation /
  द्वारा: Dasmann, Raymond Fredric, 1919-
  प्रकाशित: (1984)
• The Ecological principles of nature conservation : applications in temperate and borel environments /
  प्रकाशित: (1992)
• Earth, air, and water : resources and environment in the late 20th century /
  द्वारा: Simmons, I. G. 1937-
  प्रकाशित: (1991)
• To live on earth : man and his environment in perspective /
  द्वारा: Brubaker, Sterling
  प्रकाशित: (1972)