Hutchinson Sarah. E., Saweyr Stacey. C. Computers, Communications, and Information - 1 - 1998 - 330 - 0 . ISBN: 0-256-25277-7 3000 Source: Бэлэг дурсгалын журмаар авсан Subjects--Index Terms: Computers Dewey Class. No.: 004 / O-73