00787cam a22002531a 4500 ca 29000629 DLC 20260227111121.0 cr_||||||||||| 830805s1922 ilub 000 0 eng ca 29000629 (OCoLC)9781599 DLC DeGH DLC premarc TS155 .R6 Rogers, Sherman. Foremen! Spark plugs or grounded wires / By Sherman Rogers. [Chicago, Ill.?] : The author, c1922. [1] leaf of plates, 32 p. : port. ; 20 cm. Also available in digital form on the Internet Archive Web site. Supervisors, Industrial. Leadership. http://hdl.loc.gov/loc.gdc/scd0001.00215904660 16540 16540