Hill, D. (1946). Co-operative research in industry. Hutchinsons Scientific and Technical Publications.
Chicago-čujuhus (17. p.)Hill, D.W. Co-operative Research in Industry. London: Hutchinsons Scientific and Technical Publications, 1946.
MLA-čujuhus (9. p.)Hill, D.W. Co-operative Research in Industry. Hutchinsons Scientific and Technical Publications, 1946.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.