1. The Rare Earth in Modern Science and Technology;Munz,1982
2. 4eme Symposium Recherche et Developpement en Energie Solaire en Suisse;Munz,1983
3. 17th IEEE Photovoltaic Specialists Conf. Record;Munz,1984
4. Quantitative Surface Analysis of Materials;Barr,1978
5. Dissertation;Brueck,1983