Garn, Stanley M.
Charles C. Thomas, 1971
Buku Teks
Kennedy, Raymond
[publisher not identified], [date of publication not identified]
Buku Teks
Count, Earl Wendel
Henry Schuman, 1950
Buku Teks
Nesturkh, M. F. (Mikhail Fedorovich)
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Seligman, C.G.
Thornton Butterworth, 1939
Buku Teks