Neil Curtis Related books How Do We Know the Earth Is Round? (How Do We Know) Heinemann Library • 1970 Planet Earth (Visual Factfinders) Kingfisher Books Ridgeway (National Trail Guides) Aurum Press, Limited • 2002 Rocks and Minerals (Spotlights) Oxford Univ Pr • 1998 The Ridgeway; National trail Guide Aurum Pr Ltd • 1995