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- Practical gastrointestinal endoscopy / Peter B. Cotton, Christopher B. Williams . - 4th ed. - Oxford : Blackwell Science , 1996 - 11, 338 s. ISBN 0-86542-851-4 [1, currently available 1]
- Chapters, articles
- Practical gastrointestinal endoscopy / Peter B. Cotton, Christopher B. Williams foreword by Marvin H. Sleisenger - Oxford : Blackwell , 1980 - 184 s. ISBN 0-632-00274-3 [1, currently available 1]
- Chapters, articles