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1पुस्तकद्वारा Shapero, Albert“…United States. Office of the Director of Defense Research and Engineering…”
प्रकाशित 1965
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2पुस्तकद्वारा Douglass, Joseph D.“…United States. Office of the Director of Defense Research and Engineering…”
प्रकाशित 1976
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3सरकारी दस्तावेज सम्मेलन की कार्यवाहीप्रकाशित 1964“…United States. Office of the Director of Defense Research and Engineering…”