Can I Use Someone Else's Work? Can Someone Else Use Mine?How do I get permission' to use somebody else's work?
In the case of photographs, it is sometimes difficult to determine who owns the copyright and there may be little or no information about the owner on individual copies. Ownership of a “copy” of a photograph – the tangible embodiment of the “work” – is distinct from the “work” itself – the intangible intellectual property. The owner of the “work” is generally the photographer or, in certain situations, the employer of the photographer. Even if a person hires a photographer to take pictures of a wedding, for example, the photographer will own the copyright in the photographs unless the copyright in the photographs is transferred, in writing and signed by the copyright owner, to another person. The subject of the photograph generally has nothing to do with the ownership of the copyright in the photograph. If the photographer is no longer living, the rights in the photograph are determined by the photographer’s will or passed as personal property by the applicable laws of intestate succession.
There may be situations in which the reproduction of a photograph may be a “fair use” under the copyright law. Information about fair use may be found at: www.copyright.gov/fls/fl102.html. However, even if a person determines a use to be a “fair use” under the factors of section 107 of the Copyright Act, a copy shop or other third party need not accept the person’s assertion that the use is noninfringing. Ultimately, only a federal court can determine whether a particular use is, in fact, a fair use under the law.
Here's the corrected link (yours had a space in it looks like)
http://www.copyright.gov/fls/fl102.html