Patrick R. Getty; Robert Sproule; David L. Wagner & Andrew M. Bush (2013). Variation in wingless insect trace fossils: insights from neoichnology and the Pennsylvanian of Massachusetts. PALAIOS. 28 (4): 243—258. Bibcode:2013Palai..28..243G. doi:10.2110/palo.2012.p12-108r. S2CID86430759.
Patrick R. Getty; Robert Sproule; David L. Wagner & Andrew M. Bush (2013). Variation in wingless insect trace fossils: insights from neoichnology and the Pennsylvanian of Massachusetts. PALAIOS. 28 (4): 243—258. Bibcode:2013Palai..28..243G. doi:10.2110/palo.2012.p12-108r. S2CID86430759.
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Patrick R. Getty; Robert Sproule; David L. Wagner & Andrew M. Bush (2013). Variation in wingless insect trace fossils: insights from neoichnology and the Pennsylvanian of Massachusetts. PALAIOS. 28 (4): 243—258. Bibcode:2013Palai..28..243G. doi:10.2110/palo.2012.p12-108r. S2CID86430759.