The contents of this weekly Bulletin are consolidated semiannually into a permanent, indexed, Cumulative Bulletin. These are sold on a single copy basis and are not included as part of the subscription to the Internal Revenue Bulletin. Subscribers to the weekly Bulletin are notified when copies of the Cumulative Bulletin are available. Certain issues of Cumulative Bulletins are out of print and are not available. Persons desiring available Cumulative Bulletins, which are listed on the reverse, may purchase them from the Superintendent of Documents.