@inproceedings{inproceedings57adc64e,
title   = {Newcastle disease: relationship between the humoral immune response measured by the hemagglutination inhibition and enzyme linked immunosorbent essays and viral challenge protection in layers},
author = {Richtzenhain, Leonardo José and Paulillo, Antonio Carlos and Jerez, José Antonio},
year = {1991},
booktitle   = {Congresso Mundial de Veterinária}
}