Browsing by Author "Helen, John"
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Item From theory to practice in rubber fabrication(The Santa Cruz Press, 1942) Helen, JohnItem From Theory to Practice in Rubber Fabrication(Alleppey The Santa Cruz Press, 1942) Helen, JohnItem From Theory to Practice in Rubber Fabrication(Alleppey The Santa Cruz Press, 1944) Helen, JohnItem From theory to practice in rubber fabrication(The santa cruiz press, 1944) Helen, John