Piwsaoad, J. “HYBRID SOLAR DRYER FOR DRYING PINEAPPLES OF RAIMOUNG COMMUNITY ENTERPRISE, LOEI PROVINCE, THAILAND”. Life Sciences and Environment Journal, vol. 20, no. 1, June 2019, pp. 97-110, https://ph01.tci-thaijo.org/index.php/psru/article/view/134825.