Vincent Zimmer
C. B. Tilanus
Harvard University. Harvard Economic Research Project.
Eben Upton
Swarup Bhunia
Vadiraj Raghawendracharya Panchamukhi
Martin D. Seyer
Shigemi Kagawa
Poul Nørregaard Rasmussen
W. F. Gossling
Barry Wilkinson
Fredrick J. Hill
Witold Lissowski
United Nations. Statistical Office.
Unknown Author
Thijs ten Raa
William H. Miernyk
Barry M. Cook
Brian Van Arkadie
Renata Dekovic