How old is it?
Subtitle: Telltale radioactivity in every living thing is cracking the riddle of age
By: by Lyman J. Briggs and Kenneth F. Weaver
Publisher: National Geographic Society
Published: 1958
Place of publication: Washington
Language: eng
Number of pages: 255
Subjects: Radioactivity
Notes: Reprinted from the National geographic magazine of August, 1958.