Henley's Twentieth century book of formulas, processes and trade secrets : a valuable reference book for the home, factory, office, laboratory and the workshop; containing ten thousand selected household, workshop and scientific formulas, trade secrets, chemical recipes, processes and money saving ideas for both the amateur and professional worker
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Henley's Twentieth century book of formulas, processes and trade secrets : a valuable reference book for the home, factory, office, laboratory and the workshop; containing ten thousand selected household, workshop and scientific formulas, trade secrets, chemical recipes, processes and money saving ideas for both the amateur and professional worker
N.W. Henley Pub., 1948, c1945
New rev. and enl. ed / by T. O'conor Sloane
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Henley's Twentieth century : formulas processes and trade secrets
Twentieth century book of formulas, processes and trade secrets
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Note
"Partial list of authorities consulted": p. [6] of prelim.
