Each issue has also a distinctive title. Includes: Fiberoptics world, as a separate section within each issue, 1989- "Year '1994' assigned twice to different annual Buyers Guides: v.29 1994 Buyers Guide (published Dec.1993) & then again as v.30 1994 Buyers Guide (published Dec.1994)."
Special Numbering
Issue for Aug. 1993 called v. 20, no. 20 but constitutes v. 29, no. 8.
Complexity Note
Laser focus world buyers' guide separately issued annually in Dec. 1989- . Cataloged separately beginning with 1998.