Roper, C. A. The complete book of locks & locksmithing / [electronic resource] / by C.A. Roper.. — 2nd ed.. — Blue Ridge Summit, Pa. : : Tab Books,, c1983.. — viii, 343 p. : : ill. ; 25 cm.
Rev. ed. of: The complete handbook of locks & locksmithing. 1st ed. c1976. Includes index.