Hughes Aircraft Co. (1978). R and D productivity: Study report (2a. ed.). Hughes Aircraft Co.
Chicago-čujuhus (17. p.)Hughes Aircraft Co. R and D Productivity: Study Report. 2a. ed. Culver City: Hughes Aircraft Co, 1978.
MLA-čujuhus (9. p.)Hughes Aircraft Co. R and D Productivity: Study Report. 2a. ed. Hughes Aircraft Co, 1978.
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