These resources are your first steps in carrying out robust primary-source research:

DAU Virtual Library includes catalog links and information from several databases and websites.

Defense Technical Information Center (DTIC) serves the DoD community as the largest central resource for DoD and government-funded scientific, technical, engineering, and business related information available today.

Defense Innovation Marketplace.
This site provides three key things: 1) DoD and Service S&T / R&D roadmaps, materials and links in one place to help industry better align its Independent Research & Development (IR&D) investments. 2) A secure portal for industry to submit project summaries on these IR&D efforts for compliance with DFARS Supplement at 48 CFR 231.205.18(c)(iii)(C) of January 30, 2012, and to share with a broader DoD audience than previously possible. 3) Allows for approved DoD personnel to access industry’s IR&D project summaries for use in program planning to improve warfighter capabilities.

Defense Acquisition Visibility Environment (DAVE) is a centralized hub that provides convenient access to Acquisition data across several disparate data repositories. Note: Access to DAVE is restricted to approved users within the DoD acquisition community.