Pramual Siripunkaw Variables involved in Physics problem-solving by tenth-graders in Thailand [microform] / Pramual Siripunkaw - Ann Arbor, Mich. : University Microfilms International , 1991 - 3 microfiches ; 11 x 15 cm. Thesis (Ph.D.)-Purdue University, 1990 Subjects--Topical Terms: Physics--Study and teaching--Thailand