TY - JOUR TI - Magnesium sulfate heptahydrate as phase change material in double slope solar still AU - Khandagre, M. AU - Gupta, B. AU - Bhalavi, J. AU - Baredar, P. JO - Journal of Thermal Engineering PY - 2021 VL - 7 SP - 196 EP - 214 DO - 10.18186/thermal.871439 ER -