Gaya APA
Tolley, G.S.. (1961).
Economics of watershed planning by G.S. Tolley and F.E. Riggs .
Ames:
Iowa State University Press.
Gaya Chicago
Tolley, G.S..
Economics of watershed planning by G.S. Tolley and F.E. Riggs.
Ames:
Iowa State University Press,
1961.
Text.
Gaya MLA
Tolley, G.S..
Economics of watershed planning by G.S. Tolley and F.E. Riggs.
Ames:
Iowa State University Press,
1961.
Text.
Gaya Turabian
Tolley, G.S..
Economics of watershed planning by G.S. Tolley and F.E. Riggs.
Ames:
Iowa State University Press,
1961.
Print.