World Farming Vol. 10 (6), Vol. 11 (6-9,11,12), Vol. 12 (2), Vol. 15 (3,5,11), Vol. 16 (1,7,10), Vol. 18 (10,11)
World Farming Vol. 10 (6), Vol. 11 (6-9,11,12), Vol. 12 (2), Vol. 15 (3,5,11), Vol. 16 (1,7,10), Vol. 18 (10,11) Bound Volumes - [s.l: s.n.] 1989.