00547nam a22001697a 4500 230526b |||||||| |||| 00| 0 eng d 0-86729-090-0 National Science Library National Science Library D 681.3.022:65.01(026) M4 Hoover, Ryan E 4484 Executive's guide to online information services New York: Knowledge Industry Publications Inc, 1984 xvi, 296p. Information technology Data communication udc BK 35115 35115