TY  - BOOK
AU  - Yao Ying
ED  - US. Air Force. Office of Aerospace Research. Aeronautical Research Laboratory
TI  - Technical reports and technical notes: on the comparison of the means of two populations with unknown variances
U1  - 629.13 
PY  - 1963///
CY  - Washington
PB  - Government Printing
KW  - Aeronautics
ER  -