Author: Ralph P. Hummel
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Genre
- Animals
- Architecture
- Art
- Biography
- Business
- Cinema
- Cookbooks
- Culture
- Design
- Drawing
- Economics
- Encyclopedia and Dictionary
- Family and Friendship
- Fitness
- Gambling
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- History
- Hobbies
- Information Technologies
- Languages
- Martial Arts
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- Military
- Music
- Novels
- Other
- Personality
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- Poetry
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- Cryptography
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- Philosophy
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