Language References
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501 Spanish Verbs
by Christopher Kendris

Practice Makes Perfect Series - Spanish Verb Tenses
by Dorothy Richmond

Complete Spanish Grammar
by Gilda Nissenberg

Spanish Pronouns And Prepositions
by Dorothy Richmond

1001 Pitfalls in Spanish
by Marion P. Holt, Julianne Dueber

Living Language: Advanced Conversational Spanish
by Crown

Spanish Terminology for the Veterinary Team
by Mosby

Spanish for Medical Personnel
by Ana C. Jarvis, Raquel Lebredo

The New Oxford Picture Dictionary
by Parnwell