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  Title Copies
Why Do We Have Different Seasons (Ask Isaac Asimov) 
Edition: A Gareth Stevens Children's Books ed 
Year: 1991 
ISBN: 0836804392 
ISBN 13: 9780836804393 
Why Do Stars Twinkle? (Ask Isaac Asimov) 
Year: 1991 
ISBN: 0836804376 
ISBN 13: 9780836804379 
Why Can't You Unscramble an Egg? and other not such dumb questions about matter 
Edition: First Edition first Printing 
Year: 1990 
ISBN: 0525672931 
ISBN 13: 9780525672937 
Why Are Some Beaches Oily? (Ask Isaac Asimov) 
Year: 1992 
ISBN: 0836807960 
ISBN 13: 9780836807967 
Why Are Animals Endangered? (Ask Isaac Asimov) 
Year: 1992 
ISBN: 0836807987 
ISBN 13: 9780836807981 
WHY A DISGUISE? 
Year: 1999 
ISBN: 0689825307 
ISBN 13: 9780689825309 
Whose mouse are you? 
Edition: 1st Aladdin Books ed. 
Year: 1986 
ISBN: 0689711425 
Whose hat is that? 
Edition: 1st 
Year: 1987 
ISBN: 089919446X 
ISBN 13: 9780899194462 
Whoo-oo Is It? 
Year: 1992 
ISBN: 053105974X 
ISBN 13: 9780531059746 
Who's Who at the Zoo! (Happy Times Adventures) 
Year: 1986 
ISBN: 081670659X 
ISBN 13: 9780816706594