TY  - RPRT
TI  - A source of error in paper extract pH determinations : contact between paper and reference electrodes
AU  - Parks, Edwin J
AU  - Herbert, R L
PY  - 1976
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 75-915
DO  - 10.6028/NBS.IR.75-915
ER  -