TY  - DATA
AU  - Guillemin, Victor
AU  - Sternberg, Shlomo.
TI  - Deformation theory of pseudogroup structures 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470400118 (online)
PY  - 1966///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0064
ER  -