@inbook{NBERc3974,
 Crossref = "NBERbrow72-1",
 title = "Introduction to "Empirical Models of Urban Land Use: Suggestions on Research Objectives and Organization"",
 author = "H. James Brown and J. Royce Ginn and Franklin J. James",
 BookTitle = "Empirical Models of Urban Land Use: Suggestions on Research Objectives and Organization",
 Publisher = "NBER",
 pages = "3-5",
 year = "1972",
 URL = "http://www.nber.org/chapters/c3974",
}
@book{NBERbrow72-1,
 title = "Empirical Models of Urban Land Use: Suggestions on Research Objectives and Organization",
 author = "H. James Brown and J. Royce Ginn and Franklin J. James and John F. Kain and Mahlon R. Straszheim",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1972",
 URL = "http://www.nber.org/books/brow72-1",
}