| 000 | 00473nam a2200157 a 4500 | ||
|---|---|---|---|
| 005 | 20220228110747.0 | ||
| 035 | _aF8901000717977 | ||
| 084 | _aWB TN 4 1983 | ||
| 100 | _aRyan, Beverly A. | ||
| 245 | _aPit latrine ventilation: field investigation methodology / -by Beverly A. Ryan and D. Duncan Mara. | ||
| 260 | _aWashington : World Bank | ||
| 300 | _a19 p. | ||
| 440 | _aTechnical note; No. 4. | ||
| 690 | _aVentilacion (Letrinas). | ||
| 700 | _aDuncan Mara, D., coaut. | ||
| 999 |
_c64389 _d64389 |
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