Nacin, David. MAA 100th anniversary CMJ Puzzle J/ David Nacin. - Washington D. C.: Mathematical Association of America, cJul 2012-Sept 2015. - v43 n4, page 274: Illustrations; 25 cm. ISSN: 0746-8342 Subjects--Topical Terms: Puzzles. Dewey Class. No.: DPer 510.5 C697 Jan 2012-Sept 2015 v. 43 & 46, n. 1-4