Note that the index numbers are only technical numbers which have no persistence. After a new system generation is done, all of them are invalid. To generate a persistent link, use the name.Use the URL:
http://ww-person.com/cgi-bin/l3/LANG=germ/F=Rodrigo@Díaz@de@Vivar/N=de@Mendoza@*@del@Cid@*@del@Cenete
Rodrigo Díaz de Vivar de Mendoza * del Cid * del Cenete
alternatively: /cgi-bin/llmult/LANG=germ/P=20007800