The card index system :
Byles, R.B.
The card index system : its principles, uses, operation, and component parts / by R.B. Byles. - London : Sir I. Pitman & Sons, Ltd., [1911]. - x, 99 p. illus. ; 19 cm. - Pitman's practical primers of business .
Card system in business.
The card index system : its principles, uses, operation, and component parts / by R.B. Byles. - London : Sir I. Pitman & Sons, Ltd., [1911]. - x, 99 p. illus. ; 19 cm. - Pitman's practical primers of business .
Card system in business.