TY  - BOOK
AU  - Cliff A D
TI  - Spatial diffusion :  An historical geography of epi   
T2  - Cambridge Geographical Studies. 14
U1  - U475:(L:4:51).574.N7, M1 
PY  - 1981///
CY  - Cambridge
PB  - Cambridge University Press        
KW  - Human Geography
N1  - Bib p. 231-37; Appendix p. 194-230
ER  -