Yokoyama, M. (1922). Fossils from the Upper Musashino of Kazusa and Shimosa. <em>Journal of the College of Science, Imperial University of Tokyo.</em> 44(1): viii + 1-200, pls. 1-17 [7 July 1922]., available online athttp://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0465_.pdf[details]
original descriptionYokoyama, M. (1922). Fossils from the Upper Musashino of Kazusa and Shimosa. <em>Journal of the College of Science, Imperial University of Tokyo.</em> 44(1): viii + 1-200, pls. 1-17 [7 July 1922]., available online athttp://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0465_.pdf[details]