@inbook{NBERc9147,
 Crossref = "NBERabra50-1",
 title = "Appendix B, Determination of Reference Dates for Annual Series with Various Timing Characteristics",
 author = "Moses Abramovitz",
 BookTitle = "Inventories and Business Cycles, with Special Reference to Manufacturer's Inventories",
 Publisher = "NBER",
 pages = "545-549",
 year = "1950",
 URL = "http://www.nber.org/chapters/c9147",
}
@book{NBERabra50-1,
 title = "Inventories and Business Cycles, with Special Reference to Manufacturer's Inventories",
 author = "Moses Abramovitz",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1950",
 URL = "http://www.nber.org/books/abra50-1",
}