RATNA, Ved. A Portable Nanogonal Rotating Hut for Observational Astronomy Activities in Schools and Colleges. SCHOOL SCIENCE, [S. l.], v. 51, n. 4, p. p.77–84, 2013. Disponível em: http://ejournals.ncert.gov.in/index.php/SS/article/view/2090. Acesso em: 16 jun. 2025.