TY  - BOOK
AU  - Balaji, Naveen 
AU  - Kumar S.
TI  - Essential Differential Geometry: the language of general relativity
SN  - 978-1717858337
U1  - 516.36 
KW  - Differential Geometry
UR  - https://www.amazon.com/Essential-Differential-Geometry-Language-Relativity/dp/1717858333/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=1623320992&sr=1-1&asin=1717858333&revisionId=&format=4&depth=1
ER  -