Day And Night : (What's the Difference?) :

by Betty Root (Collaborator), Betty Root (Collaborator), Betty Root (Collaborator), Peter Firmin (Illustrator), Heather Amery (Author)

• Used

  Hardcover
  1985

  $3.25

• Used

  Paperback
  1990

  $6.59

  -- Pictures and complementary text explain two fundamental principles of time -- Illustrated in full color