TY  - RPRT
TI  - Methodological issues and future directions in the evaluation of early intervention programmes.
AU  - C B Eayrs
AU  - R S Jones
DO  - 10.1111/j.1365-2214.1992.tb00337.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1555264/
ID  - 1555264
ER  -