If you have an old Spanish guitar, and would like to know more about the maker, Zavaleta's La Casa de Guitarras has put together an extensive set of biographies of Historic Spanish makers from the 18th, 19th, and 20th centuries, illustrated with some photos of makers, their guitars, and even some sound samples.
http://www.azstarnet.com/public/commerce/zavaletas/greene/bioshist.htm.

James B. Greenberg
Zavaleta's La Casa de Guitarras
http://go.to/Zavaletas-guitars

See also:

Guitar History
http://www.guitarsite.com/history.htm?nl62

Guitar Museum
http://www.guitarsite.com/history1.htm?nl62

Luthiers
http://www.guitarsite.com/makers.htm?nl62
http://www.guitarsite.com/database/Makers/?nl62

Classical Guitar
http://www.guitarsite.com/classical.htm?nl62