Gorrie, R. M. (1946). Soil and water conservation in the Punjab.
Chicago Style aipamenaGorrie, R. Maclagan. Soil and Water Conservation in the Punjab. [Simla?], 1946.
MLA aipamenaGorrie, R. Maclagan. Soil and Water Conservation in the Punjab. 1946.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.