English for students of natural sciences /
Karapetian, Karo M.
English for students of natural sciences / by Karo M. Karapetian, Vatchick G. Grigorian. - Yerevan, Armenia : Yerevan State University Press, 1997. - 221 p.
English language.--Science
English for students of natural sciences / by Karo M. Karapetian, Vatchick G. Grigorian. - Yerevan, Armenia : Yerevan State University Press, 1997. - 221 p.
English language.--Science