THE LANGUAGES OF PAO. San Francisco, California, Columbia, Pennsylvania: Underwood/Miller, 1979. Octavo, cloth. Later edition. Limited to 500 copies of which this is one of 389 trade copies. Anatomy of Wonder (2004) II-1164. Survey of Science Fiction Literature III, pp. 1135-39. A fine copy in fine dust jacket. (#163083).
"First edition - July, 1979" on copyright page.