The Personnel Research Online Papers (PROP)
Human Resource Research Databank (HRRD)

1000+ Technical Reports from the Air Force Human Resources Laboratory, its predecessors & successors

Air Force Collection (with Restricted Distribution Reports):
<https://www.dp.hq.af.mil/dpx/techreps/>

 
The ICODAP (Non-Profit,  Public) Collection:
 <http://www.icodap.org/papers>

Index to PROP Scanning Project:

TR Scanning Project Shipping Control Sheet

AFHRL Technical Report Index Files (Annotated Bibliographies - Under Construction)

The People who made the Tech Paper Collections come to life:

Rosa Williams & Elizabeth (Nell) Krause (above)
as well as Doug Coker, Joe Kite, and Emma Rodriguez (below)

And Johnny J. Weissmuller,
Personnel Research Psychologist, HQ AFPC Military Testing Section