TY  - RPRT
TI  - Decrease in the number of human Ap and Ad spermatogonia and in the Ap/ Ad ratio with advancing age. New data on the spermatogonial stem cell.
AU  - M Nistal
AU  - J Codesal
AU  - R Paniagua
AU  - L Santamaria
DO  - 10.1002/j.1939-4640.1987.tb00950.x
UR  - https://pubmed.ncbi.nlm.nih.gov/3583908/
ID  - 3583908
ER  -