Sevryukov, N.
Peace, [19?-]
Buku Teks
Stevenson, Edward J., author
Noyes Data Corporation, 1977
Buku Teks
Swarup, D., author
Rakesh K. Rastogi for Rastogi, 1981
Buku Teks
Cottrell, Alan, author
ELBS/Edward Arnold, 1975
Buku Teks
Higgins, Raymond.A.
E. Arnold,, 1980
Buku Teks