TY  - RPRT
TI  - Improved method for progesterone determination in milk-fat.
AU  - R Claus
AU  - E Rattenberger
DO  - 10.1016/s0007-1935(17)32795-1
UR  - https://pubmed.ncbi.nlm.nih.gov/487058/
ID  - 487058
ER  -