Measures for improving the level of voluntary compliance with tax obligations: technical papers and reports of the 18th. General assembly of the Inter-American Center of Tax Administrators (CIAT). Cartagena, Colombia, 21-25 May 1984 .-- Amsterdam : International Bureau of Fiscal Documentation , 1985
.--168 p. 25 cm. .-- ( Publications of the International Bureau of Fiscal Documentation;38 ).
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