TY  - BOOK
AU  - Butter Michael
AU  -  Madge Niocla
TI  - Cycles of disadvantages :  Review of research   
SN  - 0 435 82852 5
U1  - Y:4:5, L7 
PY  - 1977///
CY  - London
PB  - Heinemann          
N1  - Bibliography : P 328-396
ER  -