The origins of the modern nylon string, or classical, guitar.
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Classical guitar with additional strings - Wikipedia
Is it easier to play thumb over guitar chords with steel string guitars compared to nylon string? - Quora
Classic Crossover Large Nylon String Guitar 14 Fret Transition
Review: Ten Affordable Solid Top Classical Guitars – – Finland's premier Guitar and Bass blog
Classical Guitar vs Acoustic Guitar: What's the difference?
Cross Guitar 1.0: Folding/Foldable Classical Nylon-String Acoustic Travel Guitar with Gig Bag[CRS1-N] : Musical Instruments
Review: Córdoba Fusion 5 is a Crossover Acoustic-Electric Nylon-String That Won't Break the Bank
Back by popular demand, a nylon-string Flamenco guitar designed and built by Yamaha Guitars. The CG172SF Nylon String Flamenco Guitar has a fresh perspective and contemporary features that deliver top level sound quality, performance and playability. Designed with lower string action for Flamenco style players, Pop/Rock guitarists will appreciate the response and attack that this instrument delivers.
Yamaha CG172SF Nylon String Flamenco Guitar
Nylon Strings vs. Steel Strings. Which Works Best for You?
Martin 000C12-16E Nylon Acoustic-Electric Guitar