Original published in D.F. Merriam, ed., 1964, Symposium on cyclic sedimentation: Kansas Geological Survey, Bulletin 169, pp. 481-495
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Figure 2
--Biotic spectra of insect beds.
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Kansas Geological Survey
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Web version March 2003. Original publication date Dec. 1964.
URL=http://www.kgs.ku.edu/Publications/Bulletins/169/Tasch/fig2.html