TY  - GEN
AU  - Nahin, Paul J.
TI  - An imaginary tale: the story of √-1
SN  - 81-7371-3995
U1  - 515.9 
PY  - 2002///, r2006
CY  - Kolkata
PB  - Universities Press
KW  - NUMBERS, COMPLEX
ER  -