Maya, Claudhia Anandhi, Insih Wilujeng, and Purwanti Widhy Hastuti. 2017. “DEVELOPMENT OF SETS-BASED WITH OUTDOOR LEARNING-METHOD Of STUDENT WORKSHEET TO ADVANCE ENVIRONMENTAL SCIENCE PROCESS SKILL AND ATTITUDE IN A VIIth GRADE HIGH SCHOOL STUDENTS”. Journal of Science Education Research 1 (1). https://doi.org/10.21831/jser.v1i1.16176.