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Carl Sagan
Solving Problems in Mathematical Analysis, Part I
Tomasz Radożycki
Problem Books in Mathematics (1)
Competition in Inflection and Word-Formation
Franz Rainer & Francesco Gardani & Hans Christian Luschützky & Wolfgang U. Dressler
Studies in Morphology (5)
Making Sense of Nonsense: The Logical Bridge Between Science ...
Raymond Moody
Dake's Study Notes
Finis Jennings Dake
The Price of Freedom
E. C. Tubb