The Economics of Sustainable Agriculture. Washington: National Academy Press, 1993 71 p.
The Economics of Sustainable Agriculture. Washington: National Academy Press, 1993 71 p.
(1993) The Economics of Sustainable Agriculture, Washington: National Academy Press 71 p.
(1993). The Economics of Sustainable Agriculture. American and Bulgarian Perspectives. Summary of a Bilateral Workshop, oktober 21-30, 1991. Washington: National Academy Press, 71 p.
The Economics of Sustainable Agriculture: American and Bulgarian Perspectives. Summary of a Bilateral Workshop, oktober 21-30, 1991. Washington: National Academy Press; 1993. p. 71 p.
