Hi Glenn,
The Windsock datafiles would be my first source. There's a two volume special about the Nieuports 11-27 and a standard volume about the Nieuport 17 and 28. Besides of that there's a wonderfull volume about the Escadrille Lafayette including 1/32 scale planes. These Windsock datafiles are THE source for WWI aircraft modelling, since I am in this hobby I never built a model without a WDF as a reference. Next to WDF are the Osprey books (Nieuport aces) and especially for Nieuports there are very interesting publications from France written by Marc Chassard and others. His book about Rene Dorme and N.3 is in fact much more then a story about a single escadrille but a groundbreaking reference for Nisuports. And there's a fascinating publication about the Nieuport camouflage - don't have it here right now but I can send you the title. At last, if you like British flown Nieuports, Cross and Cockarde once published a very nice book about Nieuports in British service. You see, when it comes to Nieuports, there's no lack of reference material.
Borsos