Sector informal (Economía) 381 (Término temático)

Library of Congress, Catalog of authorities Informal sector (Sector informal (Economía)) https://id.loc.gov/authorities/subjects/sh85066135.html

Biblioteca Nacional de España, Catalogo de Autoridades Sector informal http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?action=display&authority_id=XX538688&index=LCSUBJECT&lang=es