Auch wenn's nix bringt:

US Copyright Law, Title 17, Chapter 1, Article 107:

Notwithstanding the provisions of 106 and 106A, the fair use of a copyrighted work,
including such use by reproduction in copies or phone records or by any other means
specified by that section, for purposes such as criticism, comment, news reporting,
teaching (...), scholarship and research, IS NOT AN INFRINGEMENT OF COPYRIGHT.

In determining whether the use made of a work in any particular case is a fair use
the factors to be considered shall include:

(1) the purpose and character of the use, including whether such use
is of a commercial nature or is for non-profit educational purposes;

(2) the nature of the copyrighted work;

(3) THE AMOUNT AND SUBSTANTIALITY of the portion used
in relation to the copyrighted work as a whole;

(4) the effect of the use upon the potential market for or value of the copyrighted work.