@article{81763,
      author = {Inhelder, Bärbel. and Piaget, Jean,},
      url = {http://library.usi.edu/record/81763},
      title = {The growth of logical thinking from childhood to  adolescence; an essay on the construction of formal  operational structures},
      publisher = {Basic Books},
      recid = {81763},
      pages = {356 p.},
      address = {[New York]},
      year = {1958},
}