Singh, S. G., Saxena, A. K., Vishwakarma, A., & Jaiswal, K. L. (2012). STUDY OF LONG -TERM VARIATION OF COSMIC RAY INTENSITY WITH INTERPLANETARY MAGNETIC FIELD (IMF). European Scientific Journal, ESJ, 8(23). https://doi.org/10.19044/esj.2012.v8n23p%p