1. Proc. Int. Conf. Synchrotron Rad. Instr. and New Developments,1977
2. Workshop on X-ray Instrumentation for Synchrotron Radiation Research,1978
3. 3roc. Int. Conf. on X-rays Detectors for Synchrotron Rad. Research,1982
4. J.R. Helliwell, personal communication.