TY  - BOOK
AU  - Olver Peter J
TI  - Equivalence, invariants and symmetry
SN  - 0521478111 (hbd)
U1  - B6:3, N5 
PY  - 1995///
CY  - Cambridge
PB  - Cambridge University Press       
KW  -  Differential
KW  -  Geometry
KW  - Mathematics
ER  -