TY  - RPRT
TI  - Extraction frequencies.
AU  - J R Valinoti
PY  - 1995
DO  - 10.1043/0003-3219(1995)065<0084:ar>2.0.co;2
UR  - https://pubmed.ncbi.nlm.nih.gov/7785809/
ID  - 7785809
ER  -