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판 5개, 최신 판부터
W.H. Freeman, 1982, ISBN 9780716713210
Rand McNally College Pub. Co., 1978, ISBN 9780528650239
Rand McNally College Pub. Co., 1975, ISBN 9780528655913
Rand McNally, 1975, ISBN 9780528650758
Markham Pub. Co., 1970, ISBN 9780841030268