P. H. E. D. Bhutan. Pu BT,
“EcoSan toilets in Handbook on toilets in Bhutan”, in
Handbook on toilet options for rural households in Bhutan : rural sanitation and hygiene programme, Thimphu, Bhutan: Bhutan, Ministry of Health, Public Health Department, PHED, 2012, pp. 4 p. (39-42); tab.; fig.