Production of monoclonal antibodies specific for the I and 1,2 flagellar antigens of salmonella typhimurium and characterization of their respective epitopes - Knapen, F. van.; Kusters, J. G.; Veld, J. H. J. Huis in't.; Vries, N. de.; Zijderveld, F. G. van.; Zwaagstra, K. A.