↑ O. P. Jaggi, History of science and technology in India, Volume 1, Atma Ram, 1969, ... In some of the important-looking buildings, gypsum cement of a light gray colour was used on the outside to prevent the mud mortar from crumbling down. In a very well constructed drain of the Intermediate period, the mortar which was used contains a high percentage of lime instead of gypsum. Bitumen was found to have been used only at one place in Mohenjo-daro. This was in the construction of the great bath...
↑ Abdur Rahman, History of Indian science, technology, and culture, Oxford University Press, 1999, ISBN978-0-19-564652-8, ... Gypsum cement was found to have been used in the construction of a well in Mohenjo-daro. The cement was light grey and contained sand, clay, traces of calcium carbonate, and a high percentage of lime...
