Efrem Sigel

• Books, libraries, and electronics
• Crisis
• Libros, bibliotecas y electrónica
• The future of videotext
• The Kermanshah transfer
• Video Discs
• Videotext
• Videotext
• Business/professional microcomputer software market, 1984-86
• Classified advertising markets, 1987-90
• Computer Publishers and Publications, 1988-89
• Computer Publishers and Publications: An International Directory and Yearbook