TY  - SER
AU  -  Silverberg, Robert, 
TI  -  Postmark Ganymede 
AV  - PS 
PY  - 2008///
PB  -  Project Gutenberg, 
KW  -  Short stories, American
KW  -  Science fiction, American
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/25629
ER  -