• Aquatic & air sports - 797
  • Arabian Peninsula & adjacent areas - 953
  • Arctic islands & Antarctica - 998
  • Astronomy & allied sciences - 520
  • Accounting - 657
  • Administration of economy & environment - 354
  • Administration of physical plant - 022
  • Adult education - 374
  • Advertising & public relations - 659
  • African languages - 496
  • African literatures - 896
  • Afro-Asiatic languages; Semitic languages - 492
  • Afro-Asiatic literatures; Semitic literatures - 892
  • Agriculture & related technologies - 630
  • Air & other specialized forces - 358
  • Algebra - 512
  • Algeria - 965
  • Altaic, Uralic, Hyperborean & Dravidian - 494
  • Altaic, Uralic, Hyperborean & Dravidian - 894
  • American drama in English - 812
  • American essays in English - 814
  • American fiction in English - 813
  • American humor & satire in English - 817
  • American letters in English - 816
  • American literature in English - 810
  • American miscellaneous writings - 818
  • American poetry in English - 811
  • American speeches in English - 815
  • Analogy - 169
  • Analysis - 515
  • Analytical chemistry - 543
  • Ancient, medieval & eastern philosophy - 180
  • Anglican churches - 283
  • Animal husbandry - 636
  • Animals (Zoology) - 590
  • Apocrypha & pseudepigrapha - 229
  • Apologetics & polemics - 239
  • Applied physics - 621
  • Applied psychology - 158
  • Architectural structure - 721
  • Architecture - 720
  • Architecture from 1400 - 724
  • Architecture from ca. 300 to 1399 - 723
  • Architecture to ca. 300 - 722
  • Area planning - 711
  • Argentina - 982
  • Argument & persuasion - 168
  • Aristotelian philosophy - 185
  • Arithmetic - 513
  • Arthropods - 595