zero frequency discriminator

16pf(cattell's 16 personality factor questionnaire beat the gun broken-staple metal fibre Bunsen-Roscoe law coverline double focus tube Floribbean forced feed oiler hagseed heading-knife henriot intrusive luxation louis the germen Mona Passage Penwegon permanent chemical modification technique potassium chromium sulfate rotational isomerism Rumex patientia Saint Gete's disease