| Description | 9 leaflets - in folder - John Betts Refiners Ltd. 1/9. Recovering Silver - From Non Destructive Testing Sources. 2/9. Recovering Silver - From Newspaper And Printing Sources. 3/9. Recovering Silver - From Medical Sources. 4/9. Recovering Silver - From Jewellery Sources. 5/9. Recovering Silver - From Jewellery Sources. (duplicate) 6/9. Recovering Silver - From Medical Sources. (duplicate) 7/9. Recovering Silver - From Photofinishing Process. 8/9. Recovering Silver - From Newspaper And Printing Sources. (duplicate). 9/9. Recovering Silver - From Non Destructive Testing Sources. (duplicate). |