Laws regarding copyright and fair use are complex, evolving, and important!
These sites provide a wealth of information including law governing printed music and recorded sound.
Copyright Term and the Public Domain in the United States
The easy-to-read chart includes a section on sound recordings.
Stanford Copyright Reminder : specifically for the Stanford community.
Includes copyright basics; file-sharing; using media in presentations; teaching activities.
Copyright & Fair Use (Stanford University Libraries) : try the helpful charts and tools.
Copyright statement in Christian Psalmody by Samuel Worcester. 2nd edition. Boston : From S.T. Armstrong's Presses, 1817.
Music Library Locked Stacks: M2116 .W349 1817