Shelly, Gary B. A record of discovery for exploring computers / [electronic resource] / Gary B. Shelly, Thomas J. Cashman, Tim J. Walker.. — Danvers, Mass., USA : : Boyd & Fraser,, c1996.. — 1 v. (various pagings) : : col. ill. ; 28 cm. — (Shelly Cashman series). - Shelly, Gary B. Shelly Cashman series. .