Alice Helen Frankel.
Machinists. (Occupational briefs on America's major job fields, no. 40)
R653418. Machinists. By Alice Helen Frankel. (Occupational briefs on America's major job fields, no. 40) NM: completely rewritten. © 11Mar49; AA110250. Science Research Associates, Inc. (PWH); 11Feb77; R653418.
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