title: Useful sources of foreign drug information.
authors.forename: J M
authors.initials: JM
authors.lastname: Ellis
mesh_terms: D004346:Drug Information Services / Q000706:statistics & numerical data; D007255:Information Services / Q000706:statistics & numerical data; D007990:Libraries / Q000706:statistics & numerical data; D010414:Pennsylvania; D010602:Pharmacopoeias as Topic; D012580:Schools, Pharmacy