por Gesell, Arnold, 1880-1961 [autor] | Reca, Telma [editor] | Loedel, Eduardo [traductor] | Bernstein, Jaime [compilador] | Ilg, Frances Lillian, 1902- [autor] | Ames, Louise Bates [autor] | Gesell, Arnold, 1880-1961. Youth, the years from ten to sixteen.
por Gesell, Arnold, 1880-1961 [autor] | Loedel, Eduardo [traductor] | Ilg, Frances Lillian, 1902- [autor] | Ames, Louise Bates [autor] | Gesell, Arnold, 1880-1961. Youth.
por Gesell, Arnold, 1880-1961 [autor] | Reca, Telma [editor] | Fabricant, Luis [traductor] | Loedel, Eduardo [traductor] | Bernstein, Jaime [compilador] | Gesell, Arnold, 1880-1961. First five years of live.
por Gesell, Arnold, 1880-1961 [autor] | Loedel, Eduardo [traductor] | Halverson, Henry Marc, 1884- [colaborador] | Gesell, Arnold, 1880-1961. First five years of life.