-
1Liburuanork Ginzberg, Eli, 1911-“...Conservation of Human Resources Project (Columbia University)...”
Argitaratua 1967
-
2Liburuanork Ginzberg, Eli, 1911-“...Conservation of Human Resources Project (Columbia University)...”
Argitaratua 1968
-
3Liburuanork Ginzberg, Eli, 1911-“...Conservation of Human Resources Project (Columbia University)...”
Argitaratua 1971
-
4Government Document Liburuanork Reubens, Beatrice G.“...Conservation of Human Resources Project (Columbia University)...”
Argitaratua 1981