Raeder-Roitzsch, J. E. (1974). Institutional forestry problems in the Sahelian region. United Nations, Secretariat, Special Sahelian Office.
Dyfyniad Arddull ChicagoRaeder-Roitzsch, J. E. Institutional Forestry Problems in the Sahelian Region. [s.l.]: United Nations, Secretariat, Special Sahelian Office, 1974.
Dyfyniad MLARaeder-Roitzsch, J. E. Institutional Forestry Problems in the Sahelian Region. United Nations, Secretariat, Special Sahelian Office, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.