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- [28] 1917 Income Tax Procedure ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE, 1917, 72 : 238 - 239
- [30] Income tax procedure 1929. A supplement to 1927 income tax procedure, bringing forward procedure for determining net income and tax, preparation of returns and payment AMERICAN ECONOMIC REVIEW, 1929, 19 (02): : 320 - 321