TY  - BOOK
AU  - GRIFELL-TATJE Emili
AU  -  LOVELL C A Knox
TI  - Productivity accounting:  The economics of business performance   
SN  - 9780521709873
U1  - X9:2, Q5 
PY  - 2015///
CY  - New York
PB  - Cambridge University Press       
ER  -