TY  - BOOK
AU  - Gamkrelidze,R.V (ed)
TI  - Geometry I: basic ideas & concepts of differential geometry
T2  - Encyclopaedia of mathematical sciences 28
SN  - 0387519998
U1  - 8.01 
PY  - 1991///
CY  - Berlin
PB  - Springer
ER  -