Encyclopedia of the Solar System. Elsevier (2007) EBSCO eBook
Hutchinson Dictionary of Space Exploration. Helicon (2005) EBSCO eBook
Schaum's Outline of Theory and Problems in Astronomy. McGraw-Hill Professional (2002) EBSCO eBook
Dictionary of Global Climate Change . Chapman & Hall (1992) EBSCO eBook
Hutchinson World Weather Guide. Helicon (2004) EBSCO eBook
Careers in Science. McGraw-Hill Professional (2004) EBSCO eBook