Chantaramanee, Wanida, Sukkaew Khamsorn, and Thirayut Phukhao. “HE ODEL F NVIRONMENTAL EVELOPMENT O NHANCE ESEARCH UALITATIVE LASSROOM CTION ESEARCH F EACHERS N HE DUCATIONAL XTENSION CHOOLS NDER HE FFICE F HE ASIC DUCATION OMMISSION N HE OWER ORTHERN ROVINCE REA”. Life Sciences and Environment Journal 18, no. 1 (May 19, 2017): 209-217. ccessed December 4, 2021.