TY  - BOOK
AU  - Beals, R.
AU  - Greiner,  P.
TI  - Calculus on heisenberg manifolds
SN  - 9780691085012
U1  - 514.76 
PY  - 1988///
CY  - Princeton
PB  - PUP
KW  - GEOMETRY OF DIFFERENTIAL MANIFOLDS
ER  -