TY  - BOOK
AU  - Abrogena, Lilibeth G. 
TI  - Comparative effectiveness of indirect and direct teacher-student interaction patterns in science instruction 
PY  - 2009///
N1  - Thesis (M.A.Ed.-Sci Ed) -- Mariano Marcos State University-Graduate School, Laoag City; Bibliography: leaves 77-79
ER  -