JP Graham, ML Polizzotto. Pit latrines and their impacts on groundwater quality: a systematic review.. „Environmental health perspectives”. 121 (5), s. 521–30, May 2013. DOI: 10.1289/ehp.1206028. PMID: 23518813. PMCID: PMC3673197.
JP Graham, ML Polizzotto. Pit latrines and their impacts on groundwater quality: a systematic review.. „Environmental health perspectives”. 121 (5), s. 521–30, May 2013. DOI: 10.1289/ehp.1206028. PMID: 23518813. PMCID: PMC3673197.