A Class in Plumbing. The School of Applied Science. The Physical Laboratory. A Class in Mechanical Drawing. THE CAUNEGIE TECHNICAL SCHOOLS PITTSBURG PA, scientific american, 1907-04-13
A Class in Plumbing. The School of Applied Science. The Physical Laboratory. A Class in Mechanical Drawing. THE CAUNEGIE TECHNICAL SCHOOLS PITTSBURG PA, scientific american, 1907-04-13
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