00906cam a22002771 4500 ca 35000223 DLC 20260227111137.0 780204s1935 xx 000 0 eng ca 35000223 (OCoLC)3603561 DLC OT DLC premarc TN730 .K6 1935 669.1 Knerr, Horace Calvin, 1888- Heat treatment [!] and metallography of steel; elements of physical metallurgy, by Horace C. Knerr. 2d ed. [Philadelphia] c1935. 161 (i.e. 167) numb. l. illus., diagrs. 28 cm. Cover-title. Includes six extra numbered leaves. "This work was first published serially in Forging, stamping and heat treating magazine."--Foreword. Steel Metallurgy. Steel Metallography. 17764 17764