Introduction to bi-factor theory : solid and hollow staircase patterns for sets of data from Mooseheart /
Holzinger, Karl J.(Karl John),1892-
Scottish Council for Research in Education,former owner.NLS
[Chicago] : Statistical Laboratory, Department of Education, University of Chicago,
c1935.
Provenance: 20th-century ink stamp on cover: Scottish Council for Research in Education, 47 Moray Place, Edinburgh.