Work Execution Improvement And Expansion Of The Rural Drinking Water Service And Creation Of The Sewage Service Or Other Forms Of Sanitary Disposal Of Excreta In The Town Of Toma, Independence District Of The Province Of Vilcas - Contract For The Execution Of Work ¿Improvement And Expansion Of The Rural Drinking Water Service And Creation Of The Sewage Service Or Other Forms Of Sanitary Disposition Of Excreta From A