@article{oai:repository.dl.itc.u-tokyo.ac.jp:00037866,
 author = {Hatta, S.},
 journal = {The journal of the College of Science, Imperial University of Tokyo, Japan = 東京帝國大學紀要. 理科},
 month = {Oct},
 note = {application/pdf},
 pages = {1--44},
 title = {On the Gastrulation in Petromyzon},
 volume = {21},
 year = {1907}
}