Revision history [back]
https://www.missions-acf.org/kitemergency/EN/5.%20ACF-Paris%20Toolbox/5.5%20Wash/01%20-%20Analysis/00%20-%20Reference%20books/02%20-%20Engineering%20in%20Emergencies.pdf
You may find it useful, one of the best practical handbook for humanitarian assistance. :)