CERN Accelerating science

@unpublished{CERN-PHOTO-7402048,
      title         = "{The SPS, with its 7 km circular tunnel, extended CERN
                       beyond the Meyrin site. Construction began in 1972.}",
      year          = "1974",
      url           = "https://cds.cern.ch/record/41836",
      note          = "Image scanned from original photo negative on 30 Sep 2014",
}