ID:DA11650890
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[by Solomon Ethe and Roger M. Pegram]
National Industrial Conference Board c1959 Studies in business policy no. 90
Available at 4 libraries
[by Solomon Ethe]
National Industrial Conference Board c1956 Studies in business policy no. 77
Available at 3 libraries
[by Solomon Ethe and Elliott F. Higgins]
National Industrial Conference Board c1954 Studies in business policy no. 69 . New product development ; 3
