Survey paper.
Publisher: H.M. Stationery Off.
Published: 1946
Place of publication: London
Language: eng
Number of pages: 58
Notes: At head of title: Department of Scientific and Industrial Research.  Fuel research.

No. 50 supersedes no. 28.
Table of contents: value: no. 50. Improved methods for the quantitative analysis of coal ash and coke ash.  1949.-  no. 58. Rapid survey of coal reserves and production; a first appraisal of results.  1946.