Cláudia Siqueira BALTAR,Ronaldo BALTAR,Migration, economic activity, and spatial reorganization of the population: a study on silkworm farming in Paraná, Brazil,Humanities Volume , 2017, Pages 67-80, ISSN , http://dx.doi.org/10.5151/9788580392500-06, (https://openaccess.blucher.com.br/)keywords :