by Ernesto Buonaiuti ... [and others]
Princeton University Press, 1970
Buku Teks
Mueller, Conrad G.
Time Incoporated, 1966
Buku Teks
Fry, Roger
enguin Books, 1940
Koleksi Publik
Lythgoe, J.N.
Oxford University Press, 1979
Buku Teks
Ronan, Tom
Lloyd O'Neil, 1972
Buku Teks