Pocket Oxford American Dictionary
Benjamin G. Zimmer
Useful Dictionary of Verbs With Prepositions
Martin H. Manser
Oxford Studies in Ancient Philosophy - Volume 57
Victor Caston
CK-12 Trigonometry - Second Edition
Ck-12 Foundation
Rationality in Action
John Rogers Searle
Webster's Dictionary for Students
Merriam-Webster
Webster's Dictionary and Thesaurus
Merriam-Webster, Inc