Investigation of Modulation and Long Term Variation of Cosmic Rays Chumbalova, R. A. ; Erkhov, V. I. ; Kolomeets, E. V. ; Likhoded, N. A. ; Shvartsman, Ya. E. ; Zhantuarova, R. B. Abstract Publication: International Cosmic Ray Conference Pub Date: 1979 Bibcode: 1979ICRC....3..348C