10821. [Mosquitoes - Extermination]: [Drainage canal in reclaimed swampland] Publication: [Panama?] , [ca. 1910]
10824. [Mosquitoes - Extermination]: [Engineers and survey equipment for drainage canal construction at New Market Creek Swamp] Publication: [Panama?] , [ca. 1910]
10825. [Mosquitoes - Extermination]: [Felling trees for drainage canal construction at New Market Creek Swamp] Publication: [Panama?] , [ca. 1910]