edited by Willi Semmler
Kluwer, 1994
Buku Teks
Mitchell, Wesley C., author
National Bereau of Economic Reseach, 1951
Buku Teks
Mitchell, Wesley C., author
National Bureau of Economic Research, 1951
Buku Teks
Artikel Jurnal
Estey, James Arthur
Prentice-Hall, 1956
Buku Teks