TY  - RPRT
TI  - [Case report: decreased laying performance as a contributing problem].
AU  - J Zentek
AU  - B Haas
AU  - U Siesenop
AU  - S Braune
PY  - 1997
UR  - https://pubmed.ncbi.nlm.nih.gov/9340261/
ID  - 9340261
ER  -