@article{oai:soar-ir.repo.nii.ac.jp:00017297,
 author = {KOENUMA,  Akira},
 journal = {Journal of the Faculty of Liberal Arts and Science, Shinshu University. Part 2, Natural science},
 month = {Mar},
 note = {Article, Journal of the Faculty of Liberal Arts and Science, Shinshu University. Part 2, Natural science 9: 15-19(1960)},
 pages = {15--19},
 title = {On the Insemination with Modified Spermatozoa in Urechis unicinctus},
 volume = {9},
 year = {1960}
}