@article{Musser_2019, title={A Study of the Copyright Renewal Rate for Maps}, url={https://journals.library.ualberta.ca/istl/index.php/istl/article/view/49}, DOI={10.29173/istl49}, abstractNote={<p>This study examines the copyright renewal of maps published in the United States from 1923 to 1950 and compares the results with a recent study of copyright renewals for books. Results indicate that, while the average copyright renewal rate for maps appears similar to that of books, the average was skewed higher by a single publisher whose renewal rate was much higher than average. With the data from that publisher excluded, the average copyright renewal rate dropped to 10% meaning that a significant number of maps copyrighted in the U.S. in the first half of the 20<sup>th</sup> century are probably in the public domain due to lack of copyright renewal.</p>}, number={93}, journal={Issues in Science and Technology Librarianship}, author={Musser, Linda}, year={2019}, month={Dec.} }