The Sunday times book of brain teasers : : 50 hard (very hard) master problems / [electronic resource] / compiled and edited by Victor Bryant and Ronald Postill.. — New York : : St Martin's Press,, c1982.. — [156] p. : : ill. ; 21 cm. ISBN: 0312775652 : $5.95 LCCN: 81021429 Subjects--Topical Terms: Puzzles. LC Class. No.: GV1493 / .S867 1982 Dewey Class. No.: 793.73