Diana P. Petkova
Pages: 1-14
Diana P. Petkova
Pages: 26-45
Nina M. Musurlieva
Pages: 65-70
Daniela D. Pastarmadzhieva
Pages: 15-25
Milen E. Dinkov
Pages: 46-64
Diana O. Dushkova and Vera A. Kasatkina
Pages: 71-87
NATURAL AND TECHNICAL SCIENCES SECTION
Dinko Hr. Dinkov
Pages: 88-103
Amer A Taqa, Nada Z. Mohammed and Tariq Y. Kassab Bash
Pages: 104-110