@inbook{NBERc5158,
 Crossref = "NBERmcke67-1",
 title = "Increasing Returns in Military Production Functions",
 author = "Malcolm Hoag",
 BookTitle = "Issues in Defense Economics",
 Publisher = "NBER",
 pages = "1-24",
 year = "1967",
 URL = "http://www.nber.org/chapters/c5158",
}
@book{NBERmcke67-1,
 title = "Issues in Defense Economics",
 author = "Roland N. McKean",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1967",
 URL = "http://www.nber.org/books/mcke67-1",
}