The _________ edition of the SLSH (1994) introduced the symbols UF/USE, BT, NT, RT, and SA to replace "see" and "see also" references.

The Correct answer is 15th

Key Points

• Sears List of Subject Headings (SLSH) was first designed in 1923 by Minnie Earl Sears and published as its first edition in 1923 under the title "List of Subject Headings for Small Libraries" based on the headings used by nine small libraries of the USA.
• The sixth edition was published in 1950 with the changed title as Sears List of Subject Headings The phrase for Small Libraries‖ was deleted from the title.
• In the second edition (1926) she added See also references.
• Isabel Stevenson Monro edited the fourth (1939) and fifth (1944) editions
• The sixth (1950), seventh (1954), and eighth (1959) editions were prepared by Bertha M. Frick.
• The thirteenth edition (1986) was prepared by Carmen Rovira and Caroline Reyes.
• The 15th edition of the SLSH (1994) introduced the symbols UF/USE, BT, NT, RT, and SA to replace "see" and "see also" references. 
  • BT, for broader terms,
  • NT for Narrow terms
  • RT for Related terms
  • SA for See Also.
  • UF for