Palmer, Frank R., 1894- Tool steel simplified; : a handbook of modern practice for the man who makes tools, [electronic resource] / by Frank R. Palmer.. — 1st ed.. — Reading, Pa., Chicago [etc.] : The Carpenter steel company,, 1937.. — vii, 128, 128A-D, 129-316 p. incl. front., illus. (part col.) diagrs. 24 cm.