ID:DA04946478
Hartley, John R.
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John R. Hartley ; publisher's message by Norman Bodek
Productivity Press c1992
Available at 3 libraries
by John Hartley ; edited by John Mortimer
Industrial Newsletters 1990
Available at 1 libraries
John Hartley
Tecniche Nuove c1986
Available at 2 libraries
Butterworths 1981
