Maslanka, C., & Maslanka, C. P. p. (1989). Professor Percival Pinkerton's most perplexing puzzles. Meadowbrook Press.
MLA CitationMaslanka, Christopher, and Christopher. Pyrgic puzzler Maslanka. Professor Percival Pinkerton's Most Perplexing Puzzles. Meadowbrook Press, 1989.
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