Author
Pan-American Exposition Buffalo, N.Y.
4
Industrial & Scientific Research Association (Madras, India)
2
Pan-American Exposition
2
Australian Clay Products Association
1
Australian Railways Union. N.S.W. Branch
1
Bakery and Confectionery Workers' International Union of America
1
Bandung, Java. Institut Teknologi
1
Dansk ingeniørforening
1
Indiana Society of Professional Engineers
1
Ingeniør-sammenslutningen
1
Institution of Engineers, Sri Lanka
1
Savez inženjera i tehničara Jugoslavije
1
Southern Plastic Industries Association (Madras, India)
1
University of Ceylon, Peradeniya
1
University of Ceylon, Peradeniya. Engineering Students Union
1
Verband Deutscher Schuhwarenhändler
1
Zhongguo gong cheng xue hui
1
İstanbul Elektrik ve Motörlü Taşıt İşçileri Sendikası
1