
Legal deposit is a legal requirement that a person or group submit copies of their publications to a repository, usually a library. The requirement is mostly limited to books and periodicals. The number of copies varies and can range from one to 19 (in Poland). Typically, the national library is one of the repositories of these copies. In some cou...
Found on
http://en.wikipedia.org/wiki/Legal_deposit

(from the article `library`) Most national libraries receive, by legal right (known in English as legal, or copyright, deposit), one free copy of each book and periodical printed ... ...interest in printing. He was the patron and friend of Robert Estienne. In 1538 he ordered Estienne to give a copy of every Greek book he printed ... ...
Found on
http://www.britannica.com/eb/a-z/l/30

A legal requirement that one or more copies of a publication be received by the copyright office or designated libraries
Found on
http://www.ifla.org/VII/s30/pub/mg1.htm#5
No exact match found.