Public Domain Aeronautical Software (PDAS)  
  1. Pergament, H.S.; and Kelly, J.T.: A Fully-Coupled Underexpanded Afterburning Rocket Plume Program (The AIPP Code). Part 1. Analytical and Numerical Techniques. Final rept. 1 Oct 72-30 Aug 74, Aerochem Research Labs Inc Princeton N J, November 1974. Accession Number: ADA019411.
  2. Pergament, H.S.; and Kelly, J.T.: A Fully-Coupled Underexpanded Afterburning Rocket Plume Program (the AIPP Code). Part II. Program User's Manual. Final rept. 1 Oct 72 - 31 Jul 75,Aerochem Research Labs Inc Princeton N J, November 1974. Accession Number: ADA006235.

Note: These reports seem to be out of print and no PDF scans have been made. If I manage to get copies, I will put them on-line for downloading.

Public Domain Aeronautical Software (PDAS)