Qualitative research (1) Labor (1) Employees (1) Work environment (1) Research (1) Quarries and quarrying (1) Miners (1) Mineral industries (1) Literature (1) Interviews (1) Intellect (1) Industrial relations (1) Granite (1) Education (1) Computer output microfilm devices (1) Business enterprises (1) Ordenadores--Salida en microfilme (1) Investigación cualitativa (1) Condiciones de trabajo (1) Puestos de trabajo (1) REVIEW (1) Empresas (1) Granito (1) Entrevistas (1) Educación (1) Literatura (1) Canteras (1) Investigación (1) Minería (1) Mineros (1)