The third annual report (covering the 18-month period from January 1969 to June 1970) of the Stanford Physics Information REtrieval System (SPIRES) project, which is developing an augmented bibliographic retrieval capability, is presented in this document. A first section describes the background of the project and its association with Project BALLOTS (Bibliographic Automation of Large Library Operations using Time Sharing), a second section examines the SPIRES I prototype, a third section considers the system development process for SPIRES II, and a fourth section outlines system scope and requirements analysis. The appendices, comprising more than half of the report, include Stanford Campus Facility Software and Hardware, Stanford Linear Accelerator Center Participation in SPIRES, Preprints in Particles and Fields, SLAC Publications List, The System Development Phase Activity, Phase Relationships and Products, Major Milestones and Schedules, Scope of SPIRES II System, Tutorial: Information Storage and Retrieval, SPIRES II Shared Facilities, and Search Guides for PPF and IPF. (Author/SP)