1. History of CERN, Vol. II, Building and Running the Laboratory 1954–65;Hermann,1990
2. The 600 MeV synchro-cyclotron: constructing CERN's smaller accelerator and the machine's role in the scientific programme;Mersits,1990
3. The organization of the experimental work around the proton synchrotron, 1960–65, the learning phase;Pestre,1990
4. Proceedings of the SC 33 Symposium held at CERN, April 22nd, 1991,1993