"Guide to using the Crichton scale with Progressive Matrices (1947) Sets A,Ab,B"
- Made:
- London
"Guide to using the Crichton scale with Progressive Matrices (1947) Sets A,Ab,B" booklet by J.C. Raven
"Guide to using the Crichton scale with Progressive Matrices (1947) Sets A,Ab,B" booklet by J.C. Raven