LEARNING DEMOCRATICALLY:USING STUDY CIRCLES
STURLA BJERKAKER2006 年出版64 页ISBN：9781862012844
PRECALCULUS WITH UNIT-CIRCLE TRIGONOMETRY
1990 年出版734 页ISBN：0314710159;0314668136
Mozart and his Circle A Biographical Dictionary
Peter Clive1993 年出版242 页ISBN：046086078X
Literary Circles and Cultural Communities in Renaissance England
2000 年出版243 页ISBN：0826213170
PRECALCULUS WITH UNIT-CIRCLE TRIGONOMETRY THIRD EDITION
DAVID COHEN1998 年出版1040 页ISBN：0534352758
PRECALCULUS WITH UNIT-CIRCLE TRIGONOMETRY SECOND EDITION
DAVID COHEN1992 年出版772 页ISBN：0314012540
SOCIOLOGY FULL CIRCLE:CONTEMPORARY READINGS ON SOCIETY SIXTH EDITION
WILLIAM FEIGELMAN1993 年出版570 页ISBN：0155005014
PUTTING QUALITY CIRCLES TO WORK A PRACTICAL STRATEGY FOR BOOSTING PRODUCTIVITY AND PROFITS
1983 年出版201 页ISBN：007003799X
