Collier's encyclopedia : volume 9
Macmillan Educational Company, 1990
Buku Referensi
Collier's encyclopedia, with bibliography and index : volume 1
P.F. Collier & Son, 1954
Buku Referensi
Collier's encyclopedia, with bibliography and index : volume 2
P.F. Collier & Son, 1954
Buku Referensi
Collier's encyclopedia, with bibliography and index : volume 3
P.F. Collier & Son, 1954
Buku Referensi
Collier's encyclopedia, with bibliography and index : volume 4
P.F. Collier & Son, 1954
Buku Referensi