Title varies slightly. Each vol. has also a distinctive title. Includes bibliographical references. Some vols. published in combined form. Publication suspended 1975-1979. Vols. for 1965-1974 published in association with the University of London Institute of Education and Teachers College, Columbia University, New York. Published also as "American edition": New York : Harcourt Brace Jovanovich, <1967-1971> Latest issue consulted: 2015 (Surrogate).
Acquired for the Penn Libraries with assistance from the Frances Baylinson Rosenbluth Fund. Acquired for the Penn Libraries with assistance from the James Hosmer Penniman Book Fund.