https://openlibrary.org/books/OL24230334M.opds Geographic aspects of information systems introduction and selected bibliography 2022-12-31T03:22:34Z Barry S. Wellar https://openlibrary.org/authors/OL2075172A/Barry_S._Wellar Council of Planning Librarians] [Monticello, Il 1971 28 p. https://openlibrary.org/books/OL24230334M https://archive.org/details/geographicaspect239well 339360