TY  - RPRT
TI  - Crossing-over during human spermatogenesis visualized cytologically.
AU  - I Hansmann
AU  - M Geisler
AU  - T Grimm
PY  - 1982
DO  - 10.1007/bf00304562
UR  - https://pubmed.ncbi.nlm.nih.gov/6897725/
ID  - 6897725
ER  -