84.32.Ff Conductors, resistors (including thermistors, varistors, and photoresistors)

L.N. Kryzhanovskii “A history of the invention of and research on the coherer” 35 (4) 334–338 (1992)
85.30.−z, 84.32.Ff (all)
A.D. Sakharov, R.Z. Lyudaev et al “Magnetic cumulation” 34 (5) 385–386 (1991)
84.32.Ff, 41.20.Gz, 84.70.+p (all)

PACS numbers