This work was funded by 973 Program of China (Grant No. 2012CB821902), National Science Foundation of China (40972014), and Chinese Academy of Sciences (KZCX2-YW-BR-07).
LIU Jun* and LI Lu.2013. Large Tetrapod Burrows from the Permian Naobaogou Formation of the Daqingshan Area, Nei Mongol, China[J]. ACTA GEOLOGICA SINICA(English edition),87(6):1501~1507
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