Work sampling: instructions for district offices: general manual
368.40973 / E582wor 1965
E.U.A. Department of Health, Education and Welfare Social Security Administration
Work sampling: instructions for district offices: general manual / pres. Hugh F. McKenna. -- Estados Unidos: SSA, 1965. 55, [2] p. : cuadros; 28 cm.
Seguridad social--Perú--Estadísticas
Mckenna, Hugh F., pres.