Tripp, Aili Mari Defending the right to subsist : the state vs. the urban informal economy in Tanzania / Aili Mari Tripp - Helsinki : World Institute for Development Economic Research (WIDER) , 1989 - 49p. : ill. ; 21 cm. - WIDER Working papers No.59 . Includes bibliographical references. Subjects--Topical Terms: Economic policy--Tanzania Gov. Doc. Class. No.: UN U WIDER WP-59