Holders of an Oxford SSO can find these (and more) via Westlaw UK and LexisIibrary.
Holders of an Oxford SSO can consult the CFR via either LexisLibrary or Westlaw US. The Westlaw subscription also includes Federal Proposed & Adopted Regulations (last 2 years), and Administrative Decisions & Guidance.
Koch & Murphy, Administrative Law and Practice (3rd edn 2010) is available to holders of an Oxford SSO via Westlaw UK
As is Administrative Law Review (Selected coverage from 1987 (vol. 39), full coverage from 1993 (vol. 46).) and & the ABA's Administrative & Regulatory Law News (Selected coverage begins with 1994 (vol. 19))
HeinOnline has full text for Administrative Law Review Vols. 1-67 (1949-2015) and Administrative & Regulatory Law News vols. 1-40 (1974-2015)