TY  - GEN
AU  - Swindells Robert E
TI  - When darkness comes
SN  - 0688220169 
AV  - PZ7.S9818 
PY  - 1975///
CY  - New York
PB  - Morrow
KW  - Science fiction
N2  -  A primitive band of people splits into two warring factions until the arrival of a common enemy unites them
ER  -