TY  - BOOK
AU  - Brumfiel Gregory W
TI  - Partially ordered rings and semi-algebraic geometry
T2  - London mathematical society lecture note series; 37
U1  - B239MR, L9-;2 
PY  - 1979///
CY  - London
PB  - Cambridge University Press       
N1  - Appendix 268-273p
ER  -