To publish is to make publicly known, and in reference to text and images, it can mean distributing paper copies to the public, or putting the content on a website.
The word publication means the act of publishing, and it also means any writing of which copies are published, and any website. Among publications are books, and periodicals, the latter including magazines, scholarly journals, and newspapers.
In Taxonomy the publicon of the description of a taxon has to comply with some rules.
Number Theory Books from 1996 - A comprehensive, well-linked and well-maintained list of Number Theory books. The Number Theory Web, which houses this web page, contains links to pre-1996 books.
Basic Library List in Number Theory - Compiled by the Mathematical Association of America (MAA). This site sub-divides Number Theory into Introductory Texts, Expositions, Elementary Monographs, Primes and Factors, Algebraic Number Theory, Analytic Number Theory, Modular Forms, P-adic Fields, Special Topics, Cryptography, History and Biography and Classic Works.