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Keywords
- Textbooks881
- United States55
- Algebra23
- Psychology23
- Computer programming19
- Mathematics19
- Programming languages (Electronic computers)18
- Teaching -- Aids and devices17
- English language -- Rhetoric16
- History16
- Accounting15
- Calculus15
- Chemistry14
- Business13
- Economics13
- Industrial management13
- Statistics13
- Canada12
- Logic12
- Academic writing11