1
Published 1987
...A50 INT 1987...
Kitap
2
Published 1993
...A50 ROL 1993...
Kitap
3
by Collion, Marie Héléne.
Published 1989
...A50 COL 1989...
Kitap
4
by Jain, H. K.
Published 1989
...A50 JAI 1989...
Kitap
5
by Nestel, Barry.
Published 1989
...A50 NES 1989...
Kitap
6
by Norton, George W.
Published 1987
...A50 NOR 1987...
Kitap
7
by Senanayake, Y. D. A.
Published 1990
...A50 SEN 1990...
Kitap