UTARI, Firma; SYAMSURIZAL, Syamsurizal. DEVELOPMENT OF THE HUMAN BLOOD CIRCULATION SYSTEM BOOKLET AS A TEACHING MATERIAL SUPPLEMENT OF NATURAL SCIENCE FOR CLASS VIII SMP / MTs. Universe, [S. l.], v. 2, n. 2, p. 192–197, 2021. DOI: 10.24036/universe.v2i2.87. Disponível em: http://universe.ppj.unp.ac.id/index.php/universe/article/view/87. Acesso em: 17 apr. 2026.