http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Manual for construction and operation of toxicity-testing proportional diluters
Environmental Research Laboratory (Duluth, Minn.)
by A. E. Lemke, W. A. Brungs, and B. J. Halligan.
Research reporting series. EPA-600/3-78-072