TY - JOUR
AU - D. Heddle
BT - Journal of Physics E: Scientific Instruments
DA - Jan-08-1971
DO - 10.1088/0022-3735/4/8/009
PY - 1971
SP - 589
EP - 592
T2 - Journal of Physics E: Scientific Instruments
TI - A comparison of the \ etendue of electron spectrometers
UR - http://stacks.iop.org/0022-3735/4/i=8/a=009?key=crossref.d918105f8c7c6567b3af5eb5f9066b04
VL - 4
SN - 0022-3735
ER -