Federal implementation guideline for electronic data interchange. ASC X12 003050 transaction set 860 purchase order change request-buyer initiated (revision 1) : implementation convention
"Electronic Commerce Acquisition Program Management Office, Standard Management Committee--Secretariat, National Institute of Standards and Technology."
"January 1998."
Microfiche. [Washington, D.C.] : Supt. of Docs., U.S. G.P.O., [1998] 3 microfiches : negative.