Lincoln, NE, US Department of Agriculture-Soil Conservation Service, pp. 90-98.
Phillips ... The accumulation of cosmogenic chlorine-36 in rocks: a method for
surface exposure dating. Science ... Pickering, E. W. and P. L. M. Veneman. 1984
.

America in Congress Assembled," February 19, 1857; Pickering to Wilkes,
January 1, ... Hydrography bears the date 1861 but was not distributed until 1873.
... 5; James A. Rawley, Turning Points of the Civil War (Lincoln, Nebraska, 1966),
pp.

... later than this date. h Probability of occurring 5 years in 10 earlier than this date
. ... during the winter, include Pickering and Veneman (1984) and Groffman et al.
... May 3 Oct 3 May 13 Sep25 Lincoln, NE Apr 14 Oct 16 Apr 28 Oct 6 St. Louis, ...