Nonlinear Optics by Boyd, Robert W. Hardback Book VG+

Mechanical and Structural Vibrations by Demeter G. Fertis- Excellent- Hardcover

Principles of Nonlinear Optics by Y. R. Shen (1984, Hardcover)

Mechanical and Structural Vibrations by Demeter G. Fertis (1995, HC)

Nonlinear Structural Engineering - 9783642069529

Manual for the Design of Reinforced Concrete Building Structure

Mechanical and Structural Vibrations by Fertis, Demeter G.

Nonlinear Oscillations, - Hardcover, by Guckenheimer John; Holmes - Very Good