انتشارات North Holland Publishing Co
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Imbabura Quechua [Imbaburapa kichwa (Quechuan/ Qichwa)]
Peter Cole, 1982
The Theory of Error-Correcting Codes
F.J. MacWilliams, N.J.A. Sloane, 1977
Intuitionism. An introduction
A. Heyting, 1971
Model Theory for Infinitary Logic: Logic with Countable Conjunctions and Finite Quantifiers
H. Jerome Keisler, 1971