Semishin, Vasilii Ivanovich
Peace, [date of publication not identified]
Buku Teks SO
edited by Bruce W. Burkhart and Wesley S. Thompson
Burgess Publishing, 1972
Buku Teks SO
Yarbrough, James D.
Burgess Publishing, 1970
Buku Teks
Deason, Temp R.
Burgess, 1968
Buku Teks
Robert, Julian L.
W.H. Freeman, 1991
Buku Teks SO