TY  - BOOK
T1  - Biographical memoir of Elmer Ambrose Sperry 1860- 1930
PP  - Washington, D.  C
PB  - National Academy of Sciences
YR  - 1955
UL  - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dun.171735
ER  -