"sparkes, john . "
the heart of computers computer systems: / john.. sparkes - 1 ed. - uk : the open university press 1972. - ", 60p.; 30 cm."
621. 381 95 uni
the heart of computers computer systems: / john.. sparkes - 1 ed. - uk : the open university press 1972. - ", 60p.; 30 cm."
621. 381 95 uni