code: def set_ref_a(self, text_ref):
          
  
          if 'author' in text_ref:
              self.author_a = text_ref['author']
          if 'work' in text_ref:
              self.work_a = text_ref['work']
          if 'subwork' in text_ref:
              self.subwork_a = text_ref['subwork']
          if 'text_n' in text_ref:
              self.text_n_a = text_ref['text_n']
          if 'language' in text_ref:
              self.language_a = text_ref['language']
  
          return
docs: Set the reference values related to the str_a compared string
          :param text_info: dict
                      -- author: str
                      -- work: str
                      -- subwork: str
                      -- text_n: str (a string instead of integer for variations
                       in numbering systems that may inlude integers and alpha
                        characters (e.g. '101b'))
          :return: void