concrete floor
131Passive solar building design — Elements of passive solar design, shown in a direct gain application …
132Tuol Sleng Genocide Museum — The Tuol Sleng Genocide Museum is a museum in Phnom Penh, the capital of Cambodia. The site is a former high school which was used as the notorious Security Prison 21 (S 21) by the Khmer Rouge regime from its rise to power in 1975 to its fall in… …
