Mukherjee P. 1. W5H of Science 2. W5H of Technology Author Rakesh Mohan Hallen Publisher Vigyan Prasar. SS [Internet]. 2011 Mar. 31 [cited 2025 Aug. 19];49(1):p.81-82. Available from: http://ejournals.ncert.gov.in/index.php/SS/article/view/911