5 books in series

501 Verbs

501 Verbs is a 5-book series with 5 released primary works first released in 1963 with contributions by Christopher Kendris, Henry Strutz, and Thomas R. Beyer.

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501 Spanish Verbs

501 Russian Verbs: Fully Conjugated in All the Tenses Alphabetically Arranged
Dictionary of 501 French Verbs
501 French verbs fully conjugated in all the tenses in a new easy to learn format
501 German Verbs