Wheeler, pp. 414, 428-432.

Selden, pp. 31, 111, 156.

Goss, p. 60.

Barter, p. 128.

(6) Punching Tools.

Barnard, p. 29.

Wheeler, p. 433.

Selden, p. 161.

(7) Gripping Tools.

For holding work: