Collier's encyclopedia, with bibliography and index : volume 15
P.F. Collier & Son, 1954
Buku Referensi
Collier's encyclopedia : volume 1
Macmillan Educational Company, 1990
Buku Referensi
Collier's encyclopedia : volume 2
Macmillan Educational Company, 1990
Buku Referensi
Collier's encyclopedia : volume 3
Macmillan Educational Company, 1990
Buku Referensi
Collier's encyclopedia : volume 4
Macmillan Educational Company, 1990
Buku Referensi