ROSS, Steven C. - LUND, Patsy H. - HAYDEN, Barbara A. Understanding and Using Application Software. vol. 1. DOS, Wordstar 4.0, Lotus 1-2-3, Release 2, And Dbase III Plus. 1st ed. St. Paul : West Publ. Co., 1988. 444 s. ISBN 0-314-34739-9. [Copy count : 1, currently available 1, at library only 0]