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  Title Copies
Disappearing Wetlands (Saving Planet Earth) 
Year: 1992 
ISBN: 0516055119 
ISBN 13: 9780516055114 
Fueling the Future (Saving Planet Earth) 
Year: 1992 
ISBN: 0516055127 
ISBN 13: 9780516055121 
Apollo 11 (Cornerstones of Freedom Second Series) 
Edition: 2 
Year: 1992 
ISBN: 051606651X 
ISBN 13: 9780516066516 
Whales 
Year: 1989 
ISBN: 0690047584 
ISBN 13: 9780690047585