REFERENCES
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- Snow , B. Drug Information: A Guide to Current Resources . New York : Neal-Schuman Publishers , 2008 .
- Roper , F.W. “Foreword.” In Introduction to Reference Sources in the Health Sciences, . , 5th ed , edited by Jeffrey T. Huber , Jo Anne Boorkman , and Jean Blackwell , vii. New York : Neil Schuman Publishers , 2008 .