HANIN, F. ENVIRONMENTAL CONCEPT BASED PjBL (PROJECT BASED LEARNING) MODELS TO INCREASE THE OBSERVATION SKILLS OF VII GRADE STUDENTS AT SMPN 1 JENANGAN PONOROGO. SEMESTA: Journal of Science Education and Teaching, [S. l.], v. 3, n. 1, p. 50–58, 2020. DOI: 10.24036/semesta/vol3-iss1/94. Disponível em: https://semesta.ppj.unp.ac.id/index.php/semesta/article/view/94. Acesso em: 5 nov. 2024.