Mercer, G. Lawrence.
Accounting and book-keeping machines (keyboard-operated) - 3rd ed., completely revised by G. Lawrence Mercer. - London, MacDonald & Evans, 1966. - 53 p. illus. 21 1/2 cm. - The Manual of modern business equipment .
67070077
B66-21723
Accounting--Data processing.
Accounting machines.
651.2 / MAN
Accounting and book-keeping machines (keyboard-operated) - 3rd ed., completely revised by G. Lawrence Mercer. - London, MacDonald & Evans, 1966. - 53 p. illus. 21 1/2 cm. - The Manual of modern business equipment .
67070077
B66-21723
Accounting--Data processing.
Accounting machines.
651.2 / MAN