Home › Authors › Peter L. Kresan 👤 Peter L. Kresan 3 books Books by Peter L. Kresan Understanding Earth , Study Gu Understanding Earth , Study Guide, eBook & iclicker 2007 Student study guide for Grotzinger, Jordan, Press, and Siever's Understanding earth 2006 Student study guide for Understanding earth, third edition, Frank Press, Raymond Siever 2000