TY  - BOOK
AU  -  Johansson,Olle
AU  -  Jonsson,Larus
TI  -  Co-operative research on input/output relationships in use of fertil izers in crops production : :  an outline of concepts and methods for j oint technical/economic studies / 
PY  - 1966///
CY  -  Paris : 
PB  -  O.E.C.D., 
KW  -  Fertilizers and manures
KW  -  Research
N1  -  Includes bibliographical references (p. 89-96)
ER  -