Formal Logic: Or, the Calculus of Inference, Necessary and Probable - Hardcover
Differential and Integral Calculus - Paperback
The Globes: Celestial And Terrestrial (1845) - Paperback
The Connexion of Number and Magnitude: An Attempt to Explain the Fifth Book of Euclid - Hardcover
!Ah y Le Lo Lay, Le Lo Ley! Musica Tipica de Puerto Rico - Paperback
!Búscalo! (Look It Up!): A Quick Reference Guide to Spanish Grammar and Usage - Hardcover
!Búscalo! (Look It Up!): A Quick Reference Guide to Spanish Grammar and Usage - Paperback
!Eureka! - Hardcover