U.S. Government Printing Office. Biopolymers , making materials natures way.
Chicago-čujuhus (17. p.)U.S. Government Printing Office. Biopolymers , Making Materials Natures Way.
MLA-čujuhus (9. p.)U.S. Government Printing Office. Biopolymers , Making Materials Natures Way.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.