Particle production ratios at 21, 31, 45 and 53 GeV in the centre of mass

Albrow, M.G.; Barber, D.P.; Bogaerts, A.; Bosnjakovic, B.; Brooks, J.R.; Clegg, A.B.; Erne, F.C.; Kanaris, A.D.; Lacourt, A.; Locke, D.H.; Murphy, P.G.; Rudge, A.; Sens, J.C.; Gee, C.N.P.; Veen, F.van der