UUsing your HP-41 advantageUsing your HP-41 advantagede Chris CoffinEdiciones (1)Using your HP-41 advantage (1985)Grapevine Pub · inglés · ISBN 9780931011047Más obras de Chris CoffinTThe Family Internet Pocket GuideThe Family Internet Pocket GuideAn easy course in using the HP 19BIIEEasy Course in Using the Hp-225Easy Course in Using the Hp-225