00363nam a22001457a 4500020001500000020000900015082001800024100002000042245004800062260002800110300003200138650001100170700002000181700001600201  a0574516657  a0574  a551 H251 19841 aHanson, Bernice1 aOur earth /cBernice Hanson and Peggy Lahs.  aChicago :bSRA,cc1984.  a58 p. :bsome ill. ; 28 cm.14aEarth.1 aHanson, Bernice1 aLahs, Peggy