TY  - RPRT
TI  - Changes to biological source materials.
AU  - K Sewerin
AU  - Emily Shacter
AU  - James Robertson
AU  - Claus Wallerius
PY  - 2006
DO  - 10.1016/j.biologicals.2005.08.020
UR  - https://pubmed.ncbi.nlm.nih.gov/16480893/
ID  - 16480893
ER  -