James A. Cox - Science - 1979 - 255 pages
Explores the world of shells and chronicles the relationship between shells and man and looks at the lives of the creatures that inhabit shells
Brian Bowers - Technology & Engineering - 1998 - 221 pages
Throughout human history people have used light to lengthen their day. Modern life is now inconceivable without the light bulb, but up until the nineteenth century the only ...