Thorstensen, T.C.

Thorstensen, T.C., 1994. Pollution prevention assessment : Sevco Tannery, Sevlievo, Bulgaria, (Wash field report no. 449) Arlington, VA, USA: Water and Sanitation for Health Project (WASH). Available at: https://es.ircwash.org/sites/default/files/Thomas-1994-Pollution.pdf.