This is a Sources Sought notice to identify capable small businesses for providing subscription services to manage the worldwide biomedical literature collection for the National Library of Medicine in Bethesda, Maryland. The potential contract has a base period from April 1, 2026, to March 31, 2027, with four one-year option periods extending through March 2031. The purpose is to gather market research on the availability of qualified small businesses to inform a potential future acquisition. Interested small businesses must submit a detailed capability statement addressing the project requirements by a specified deadline. No budget information is provided, and this notice is not a solicitation or a commitment to award a contract.