TY  - BOOK
AU  - Simak,Clifford D.
TI  - Project Mastodon
AV  - PS 
PY  - 2007///
PB  - Project Gutenberg
KW  - Science fiction
KW  - Time travel -- Fiction
N1  - Public domain in the USA; Electronic text
UR  - http://www.gutenberg.org/ebooks/22216
ER  -