Yasseen, Leonard C., author
New York, NY, American Research Council
Buku Teks
edited by James B. Grace, David Tilman
Academic Press , 1990
Buku Teks
Stakman, E.C., author
Ronald Press, 1957
Buku Teks
edited by R.S. Singh ... [et al.]
Oxford & IBH, 1988
Buku Teks
Weaver, John E., author
McGraw-Hill, 1938
Buku Teks