English for students of natural sciences /
Karapetian, K.M.
English for students of natural sciences / Karo, M. Karapetian, Vatchick, G. Grigorian ; YSU. - Yerevan : Yerevan State University Press , 1997. - 221 p.
English language Natural sciences
Английский язык
English for students of natural sciences / Karo, M. Karapetian, Vatchick, G. Grigorian ; YSU. - Yerevan : Yerevan State University Press , 1997. - 221 p.
English language Natural sciences
Английский язык