The Relationship of Conservation Tasks From the Concept Assessment Kit to the Sra Primary Mental Abilities Battery for a Sample of Fifty-Six Kindergarten Children

Goldschmid, M. L. and Bentler, P. M. Manual: Concept assessment kit: Conservation.. San Diego: Educational and Industrial Testing Service , 1968.

Science Research Associates. Manual: SRA primary mental abilities, revised . Chicago: Science Research Associates , 1963.