Farmers' success with tropical grasses: cop-pasture rotations in mixed farming in East Africa / editor, Joseph G. Boonman
Development Assistance, [date of publication not identified]
 Buku Teks
Coombs, Philip H.
Attacking rural poverty: how nonformal education can help
Johns Hopkins University Press, 1974
 Buku Teks
Coombs, Philip H.
Memerangi kemiskinan di pedesaan melalui pendidikan non-formal = Attacking rural poverty; how nonformal education can help
Rajawali, 1985
 Buku Teks
Coombs, Philip H.
Memerangi kemiskinan di pedesaan melalui pendidikan non-formal = Attacking rural poverty; how nonformal education can help
Rajawali, 1984
 Buku Teks
Coombs, Philip H.
Attacking rural poverty: how nonformal education can help
John Hopkins University Press, 1988
 Buku Teks