Home Run! Science Projects with Baseball and SoftballRobert L. Bonnet, Dan Keen · First published 2009Open the Tome
Giant book of winning science fair projectsRobert L. Bonnet, Bob Bonnet, Dan Keen · First published 2000Open the Tome
Science fair projectsRobert L. Bonnet, Dan Keen · First published 1995 · Latest edition 1999Open the Tome
Science Fair Projects with Electricity and ElectronicsDan Keen, Robert L. Bonnet · First published 1997Open the Tome
Science fair projects with electricity & electronicsRobert L. Bonnet · First published 1996Open the Tome
