In 1948, it was agreed that a study of classification should be made, and a committee of scientists was appointed under the leadership of Professor. J. D. Bernal.
p. 127 - The Classification Research Group 1952—1962 (1962)
In 1948, it was agreed that a study of classification should be made, and a committee of scientists was appointed under the leadership of Professor. J. D. Bernal.
p. 127 - The Classification Research Group 1952—1962 (1962)