The development of the labour-force in Costa Rica - Churnside Harrison, Edward Róger (Sussex : ER Churnside H, 1979)
Tesis (doctor en filosofia)--University of Sussex. School of Arts and Social Studies. Department of Economics, 1979.
Keywords: MANO DE OBRA -- COSTA RICA; TRABAJO Y TRABAJADORES -- COSTA RICA; SINDICALISMO -- COSTA RICA