Facts on File, 1988
Buku Referensi
Facts on File, 1988
Buku Referensi
Nowicki, Andrzej, editor
[Springer, ], 2012
eBooks
edited by Charles Singer ... [and others]
Clarendon Press, 1954-85
Buku Teks SO
P. F. Collier & Son Corporation, 1959
Buku Teks SO