TY  - BOOK
AU  - Boothby William M
TI  - Introduction to differentiable manifolds and Riemannian geometry
U1  - B6:3, L5 
PY  - 1975///
CY  - New York    
PB  -  Academic Press       
KW  -  Riemannian manifolds
KW  - Differentiable manifolds
ER  -