1. Income tax. Manual of instructions, field audit of income tax returns: pt. 1, Corporations, pt. 2, Individuals, partnerships, and fiduciaries: prepared under auspices of Training Section, Staff Division, Income Tax Unit, in collaboration with supervising agents and internal revenue agents in charge. Bookmark Corporate/Agency Authors: Internal Revenue Bureau and Treasury Department Publisher: Internal Revenue Bureau Date: 1925 SuDoc number: T 22.31:56