"Reference Books, Medical." . . "Industry United States Directories." . . "Economics, Medical United States Directory." . . "Economics, Medical United States Directories." . . "Investments United States Directory." . . "Industry United States Directory." . . "Health Services United States Directory." . . "Investments Directories." . . "Health Services United States Directories." . . . . "Medical and healthcare marketplace guide" . "The medical and healthcare marketplace guide"@en . . . "Electronic journals" . . . . . . . "Medical & healthcare marketplace guide (Online)" . . . . . . "Medical & healthcare marketplace guide" . . . . . . . . . . . . "Periodicals" . "The Medical and healthcare marketplace guide"@en . . . . . . . . . . "Directories"@en . "Directories" . . . . . .