Bibliography of Nicholas, Robert L., by subject:

•	Spanish language -- Textbooks for foreign speakers -- English (6)
•	Amazon.com -- Reference -- General (5)
•	Spanish language -- Grammar (5)
•	Amazon.com -- Reference -- Foreign Languages -- Instruction -- Spanish (2)
•	Amazon.com -- Reference -- Dictionaries & Thesauruses -- English (All) (2)
•	Amazon.com -- Reference -- Dictionaries & Thesauruses -- Foreign Language -- Spanish (2)
•	Reference -- Foreign Languages -- Instruction -- Spanish (2)
•	Reference -- General (2)
•	Reference -- Foreign Languages -- General (1)
•	Reference -- Words & Language -- Linguistics (1)
•	Reference -- Foreign Languages -- Instruction -- General (1)
•	Amazon.com -- Reference -- Foreign Languages -- Instruction -- Latin (1)
•	Amazon.com -- Formats -- Libros en español -- Referencia (1)
•	Spanish language -- Text-books for foreign speakers -- English (1)
•	Unamuno, Miguel de,1864-1936 -- Criticism and interpretation (1)
•	Spanish language -- Text-books for foreign speakers -- English -- Handbooks, manuals, etc (1)
•	Reference -- Dictionaries & Thesauruses -- Science (1)