Antzeko izenburuak: The DOUBLEDAY pictorial library of the arts :
- The DOUBLEDAY pictorial library of technology : man remakes his world /
- The DOUBLEDAY pictorial library of growth of ideas : knowledge, thought, imagination /
- The DOUBLEDAY pictorial library of man in society : patterns of human organization /
- The DOUBLEDAY pictorial library of healt and economics : mans figt against sickness and want /
- The DOUBLEDAY pictorial library of communication and language : networks of thought and action /
- The doubleday pictorial library
Gaia: ENCICLOPEDIAS Y DICCIONARIOS
Gaia: LIBROS DE CONSULTA
- The COLUMBIA encyclopedia /
- NUEVA acta 2000 : enciclopedia sistemática /
- Manual de fuentes de información /
- The LINCOLN library of essential information /
- The DOUBLEDAY pictorial library of technology : man remakes his world /
- The DOUBLEDAY pictorial library of man in society : patterns of human organization /