by Horace D. Crockford [and others]
John Wiley & Sons, 1975
Buku Teks
Cooper, Melanie M., author
McGraw-Hill, 2009
Buku Teks
Woods, A.E., author
The Avi Publishing, 1977
Buku Teks
Jurch, George R., author
Burgess, 1975
Buku Teks
Hamblin, W. Kenneth (William Kenneth), 1928-, author
Burgen Publishing, 1967
Buku Teks