Research Institute
Encyclopedia
The Institute of Geodesy, Yerevan
Armen Aghalyan, 1978
'Algorythm' Scientific-Research Center, Yerevan
Stepan Qyurqchyan, 1985
Grigori Grigoryan, Armen Aghalyan, 1970s
Institute for Physical Research
Makabeh Manouelyan, 1965
H.Rashidyan, A.Hakobyan, 1984