TY  - BOOK
AU  - Wilson A G
TI  - Catastrophe theory and bifurcation :  Application t   
T2  - Croom Helm series in Geography and Environment
U1  - U43:(B), M1 
PY  - 1981///
CY  - London
PB  - Croom Helm U. K.       
KW  - Urban Geography
N1  - Bibliography p.301-13
ER  -