Call numbers tell you where a book is shelved. It is the "address" of the book.
The Drexel Library uses Library of Congress Classification which groups titles by subject matter.
The following call number ranges are assigned to the Pharmaceutical industry, and to related topics.
HD9665-HD9675 Pharmaceutical industry
KF1879 Law - Drug & pharmaceutical industry U.S.
R7275 Medical personnel & other professions
RA401-RA402 Pharmaceutical policy
RA975.5 P5 Pharmacies. Drug distribution systems
RM300-RM666 Drugs and their actions
RS1-RS441 Pharmacy and materia medica
RS152 Hospital pharmacy
RS100.5 Pharmaceutical ethics
R724-R726.2 Medical ethics