Some publishers withhold online access for the newest publication dates (usually 6-18 months) to preserve the value of the advertising in the paper version of the journal. Embargos are imposed by the publishers, not by the library.
When TTUHSC El Paso does not have an embargo-free source for a specific title, the only option to obtain a copy of the article is to purchase an interlibrary loan (ILL) request from the TTUHSC El Paso Interlibrary Loan Department. The TTUHSC El Paso library may be able to locate a non-TTUHSC library which subscribes to the paper publication and obtain a scanned PDF copy.
In some very rare cases, the publisher does not license the content even to libraries, requiring individual users to make a personal purchase directly from the publisher.