Classification. Class P, P-PA: Philology, linguistic, classical philology, classical literature.

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• Classification. Class P, P-A: Philology, linguistics, classical philology, classical literature (with supplementary pages).
  Almmustuhtton: (1955)
• Class P. Subclasses P-PA. Philology, linguistics, classical philology, classical literature Library of Congress classification schedules combined with additions and changes through 1988
  Almmustuhtton: (1989)
• Library of Congress classification schedules combined with additions and changes through 1986 Class P Subclasses P-PA Philology, Linguistics, Classical Philology, Classical Literature
  Almmustuhtton: (1987)
• Classification. Class P, PB-PH: Philology, modern European languages. Printed as manuscript.
  Almmustuhtton: (1933)
• Classification. Class P, PJ-PM supplement.
  Almmustuhtton: (1936)