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Published online by Cambridge University Press: 19 July 2016
Since 1984, we have undertaken a spectroscopic survey of planetary nebulae, both at La Silla (E.S.O.)., and at the Observatoire de Haute Provence (France), Up to now, the spectra of about 900 PN have been obtained; all 723 spectra observed at La Silla have been reduced and the line intensities have been measured for 250 of them; about one fourth of the 182 OHP spectra have been reduced.