VA 145-832 U.S. Copyright Office "Copyright c1982 Rebecca M. Espinosa and Marie Tharp." Available also through the Library of Congress Web site as a raster image.
Espinosa, A. F.
1982
<a rel="nofollow" class="external free" href="https://www.loc.gov/item/85694236/">https://www.loc.gov/item/85694236/</a>