Wells, A study of the formants of the pure vowels of British English

Abbreviations used

cm. centimetres
cps cycles per second
dB decibels
F formant (F1 = first formant, F2 = second formant, etc.)
fig. figure
Gen.Am. General American (pronunciation, dialect)
i.p.s. inches per second
JASA Journal of the Acoustical Society of America
kc/s kilocycles per second
Lg. Language (Journal of the Linguistic Society of America)
mm. millimetres
RP Received Pronunciation (see ch.II, Subjects)
sec. seconds
std. dev. standard deviation