Cambridge Learner's Dictionary
Cambridge University Press
Riemann's Zeta Function
Harold M. Edwards
Knowledge Representation: Logical, Philosophical, and Computational ...
John F. Sowa
Heaven's Command
Jan Morris
How to Learn Any Language: Quickly, Easily, Inexpensively Enjoyable, ...
Barry Farber
Modeling Forest Trees and Stands
Harold E. Burkhart & Margarida Tomé