Amazon.com: Fretless 6 String Electric Bass Guitar Millettia Laurentii+Okoume body : Musical Instruments
Fretless Bass: A Hands-On Guide Including Fundamentals, Techniques, Grooves and Solos: des Pres, Josquin, Brunel, Bunny: 0073999956962: Amazon.com: Books
Amazon.com: Stagg BC300FL Fretless 4-String Fusion Electric Bass Guitar - Black : Musical Instruments
Electro Acoustic Fretless Bass Guitar by Gear4music : Amazon.co.uk: Musical Instruments & DJ