Singh, S. G., A. K. Saxena, A. Vishwakarma, and K. L. Jaiswal. “STUDY OF LONG -TERM VARIATION OF COSMIC RAY INTENSITY WITH INTERPLANETARY MAGNETIC FIELD (IMF)”. European Scientific Journal, ESJ, Vol. 8, no. 23, Oct. 2012, doi:10.19044/esj.2012.v8n23p%p.