Essentials of English Grammar - Paperback
Analytic Syntax - Paperback
The Articulations of Speech Sounds Represented by Means of Analphabetic Symbols - Paperback
Negation in English and other languages - Paperback
Growth and Structure of the English Language - Paperback
!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