Unknown Author
William Stanley Jevons
Rukman Adiradja
G. G. Smith
Hind, Henry Youle
United States. General Accounting Office
Celso Puente
Surjadi Ardiwilaga
M. Devereux Carter
Edwin Gilpin
Günter B. Fettweis
H. U. Bielenstein
Robert Grant Haliburton
James D. Bliss
Bernardo F. Grossling
Richard Heinberg
D. B. Dowling
Frank Darwyn Spencer