TY  - BOOK
AU  - Huckfeldt R Robert
AU  -  Kohfeld C W
AU  -  Likens Thomas W
TI  - Dynamic modelling: An introduction
T2  - Sage University paper series on quantitative applications in the socila sciences
U1  - B2893P,2, M2 
PY  - 1982///
CY  - London
PB  - Sage         
ER  -