TY - BOOK AU - Ludwig, Oswald A. AU - xx, 686 p. AU - Ludwig. A Earl AU - Title TI - Metal work, technology and practice SN - 62051718 PY - 1962/// CY - Bloomington, Ill. PB - McKnight & McKnight Pub. Co. KW - DKM, DEM KW - Machine-shop practice KW - Metal-work ER -