@incollection{egenhofer-advancing-2016,
    author = "Egenhofer, Max J and Clarke, Keith C and Gao, Song and Quesnot, Teriitutea and Franklin, W. Randolph and Yuan, May and Coleman, David",
    editor = "Onsrud, Harlan and Kuhn, Werner",
    title = "Contributions of {GIScience} over the Past Twenty Years",
    booktitle = "Advancing Geographic Information Science: The Past and Next Twenty Years",
    publisher = "{GSDI} association press",
    year = "2016",
    chapter = "1",
    pages = "9--34",
    isbn = "978-0-9852444-4-6",
    mykey = "visviewshedsiting",
    href = "\bibhref{206-egenhofer-advancing-maine-2016}"
}