TY  - RPRT
TI  - Falling sperm quality.
AU  - N Keiding
AU  - A Giwercman
AU  - E Carlsen
AU  - N E Skakkebaek
PY  - 1994
DO  - 10.1136/bmj.309.6947.131b
UR  - https://pubmed.ncbi.nlm.nih.gov/8038663/
ID  - 8038663
ER  -