Media type: E-Article Title: Ups and Downs of the N.H.S Contributor: Challis, A. W. H. imprint: BMJ, 1963 Published in: BMJ Language: English DOI: 10.1136/bmj.1.5330.608-a ISSN: 0959-8138; 1468-5833 Keywords: General Earth and Planetary Sciences ; General Environmental Science ; General Medicine ; General Medicine Origination: Footnote: Access State: Open Access