| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| COST 210: Influence of the Atmosphere on Interference Between Radio Communications Systems at Frequencies Above 1GHz | 978-92-826-2400-5 (92-826-2400-5) | 1991 |
| If I Call, Who Can Answer?: Text Telephone Systems in Use in Europe - a Way Forward to Compatibility | 978-92-826-2039-7 (92-826-2039-5) | 1991 |