Ministry of Agriculture and Forests. Payment for environment services : field guide for Bhutan / - Thimphu, Bhutan : Ministry of Agriculture and Forests, November 2015. - ix, 48 p. : ill. ; 24 cm. ISBN: NA LC Class. No.: GD00225 Dewey Class. No.: A3.1 / MoAF Gov. Doc. Class. No.: A3.1