F021.6
Bul
S        Bulgarian-American Colloguium (1989 M . 16: sofia).
                 Scientific relationships between Central Library at the Bulgarian Academy of Sciences and  the Scientific Libraries of the United States of America.--Sofia: Scientific Information Centre at the Bulgarian Academy of sciences, 1989.
                 38 p. :  20 cm.

1.COPERACIÓN BIBLIOTECARIA  2. BULGARIA 3. ESTADOS UNIDOS DE AMERICA I. t