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Special Cases—History

• In general, form number 11 is used for works dealing with the history of any aspect of a subject within a classification schedule
  • For example, WM 11 is used for both Psychiatry $x history and Psychotherapy $x history

Exceptions (noted in the schedule)

• History of a drug is classed with the drug (not in QV 11)

• W 11 and WB 11 are not used. Use instead the appropriate number in WZ schedule
  • In rare exceptions when there is no appropriate WZ number, the history of a topic is classed in the same number used for works on current practice in the W schedule

• WB 900-962 are used for the history of complementary therapies

• History of a single infectious disease is classed with the infectious disease (not in WC 11)

• History of a society is classed in form number 1 in an NLM schedule where applicable

• Histories of schools, laboratories, hospitals, institutes, etc. are classed in the appropriate form number for the type of entity
  • For example, history of a medical school is classed in W 19 while history of a laboratory is classed in QY 24