Constant and variable occupations and their bearing on problems of vocational education.
Ayres, Leonard Porter, 1879-1946.
Constant and variable occupations and their bearing on problems of vocational education. - New York City, Division of Education, Russell Sage Foundation [1914] - 11 p. 23 cm. - [Russell Sage Foundation, New York. Division of Education. Pamphlets] E136 .
e 14002061
Vocational guidance.
Occupations.
HF5381 / .A85
Constant and variable occupations and their bearing on problems of vocational education. - New York City, Division of Education, Russell Sage Foundation [1914] - 11 p. 23 cm. - [Russell Sage Foundation, New York. Division of Education. Pamphlets] E136 .
e 14002061
Vocational guidance.
Occupations.
HF5381 / .A85