Columbia subject headings:
Piaget, Jean, 1896-1980.
Harvard subject headings:
Piaget, Jean, 1896-1980.
Princeton subject headings:
Piaget, Jean, 1896---Contributions in biology.
Piaget, Jean, 1896---Contributions in psychology.
Piaget, Jean, 1896---Contributions in theory of knowledge.
Piaget, Jean, 1896-1980.
Psychologists--Switzerland--Biography.