TY - BOOK T1 - Improved density gradient separation techniques using sodium polytungstate and a comparison to the use of other heavy liquids DA - 1993. CY - [Denver, Colo.] : AU - Skipp, Gary. AU - Brownfield, Isabelle K. VL - 92-386 CN - I 19.76: PB - U.S. Dept. of the Interior, U.S. Geological Survey : PB - [Books and Open-File Reports Section, distributor], PP - [Denver, Colo.] : PY - 1993. N1 - Distributed to depository libraries in microfiche. N1 - Shipping list no.: 93-1308-M. ID - 198767 KW - Centrifugation, Density gradient. KW - Separation (Technology) KW - Sedimentation analysis. TI - Improved density gradient separation techniques using sodium polytungstate and a comparison to the use of other heavy liquids ER -