| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Anthology of German poetry through the 19th century,: In English translations with the German originals | 978-0-8044-6241-9 (0-8044-6241-0) | 1972 | |
| Interlingua;: A grammar of the international language, | 978-0-8044-0186-9 (0-8044-0186-1) | 1971 | Hugh E. Blair |
| Interlingua-English: A Dictionary of the International Language | 978-0-8044-0188-3 (0-8044-0188-8) | 1972 | |