docs: def __get_data_citation(self, l):
          """
          If originalDataURL / investigators not in root data, check for a dataCitation pub entry.
          :return:
          """
          # loop once for each publication entry
          for pub in l:
              try:
                  # at the moment, these are the only keys of interest inside of dataCitation. Check each.
                  for key in ["url", "investigators"]:
                      if pub["type"] == "dataCitation" and key in pub:
                          noaa_key = self.__get_noaa_key(key)
                          self.data_citation[noaa_key] = pub[key]
              except KeyError:
                  # no "type" key in pub
                  logger_lpd_noaa.info("lpd_noaa: get_data_citation: KeyError: pub is missing 'type'")
          return