Sufia Kamal National Public Library Online Search for 'Provider:Publishing house of the bulgarian academy of sciences,'

Science technology man.

Sofia : Publishing house of the bulgarian academy of sciences, 1973 . 316 p. ; 25 cm..

Sofia : Publishing House of the Bulgarian academy of sciences, 1975 . 365 p. ; 24 cm..

Bulgaria : Sofia Publishing House of the Bulgarian Academy of Sciences, 1973 . 214 p. ; 24 cm..