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harvard.edu
ui.adsabs.harvard.edu
Parrish، J.T.؛ Peterson, F.؛ Turner, C.E. (2004). "Jurassic "savannah"-plant taphonomy and climate of the Morrison Formation (Upper Jurassic, Western USA)". Sedimentary Geology. ج. 167 ع. 3–4: 137–162. Bibcode:2004SedG..167..137P. DOI:10.1016/j.sedgeo.2004.01.004.
worldcat.org
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