• https://oxfamilibrary.openrepository.com/handle/10546/112528
• https://oxfamilibrary.openrepository.com/handle/10546/550808
• https://oxfamilibrary.openrepository.com/handle/10546/326192
• https://oxfamilibrary.openrepository.com/handle/10546/620428
• https://oxfamilibrary.openrepository.com/handle/10546/294239
• https://oxfamilibrary.openrepository.com/handle/10546/620426
• https://oxfamilibrary.openrepository.com/handle/10546/242997
• https://oxfamilibrary.openrepository.com/handle/10546/297451