00290nam a2200109Ia 450000500170000000800410001702000150005808200150007310000200008824500350010826000370014320260205101251.0260111s9999||||xx |||||||||||||| ||und||  a0516261118  a979.1  PET  aPetersen, David 0aPetrified forest national park  aNew YorkbChildren's pressc1996