https://nonprofitlocator.org/organizations/pa/devault/050588218-main-line-association-for-continuing-education https://nonprofitlocator.org/organizations/pa/devault/231950428-great-valley-nature-center https://nonprofitlocator.org/organizations/pa/devault/232078247-charlestown-historical-society-incorporated https://nonprofitlocator.org/organizations/pa/devault/256799731-katherine-alexandra-charitable-foundation