Curriculum : design and development /

by Pratt, David, Pratt, David
Published 1980

Investing in pastoralism : sustainable natural resource use in arid Africa and the Middle East /

by Pratt, David John 1932-
Published 1997

Ingeniería Económica

by White, john A | Agee, Marvin H | Case, Kenneth E | Pratt, David B
Published 2001

Ingeniería económica /

Published 2001