The type of protection called "increased safety"
By: by Fr. Hülsberg ; translated from the German by L.J. Lawrence
Series: Paper / The Eighth International Conference of Directors of Safety in Mines Research, Dortmund-Derne, Germany, 1954 -- no. 45
Publisher: Safety in Mines Research Establishment
Published: 1954
Place of publication: Sheffield]
Language: eng
Translated from: ger
Number of pages: 23
Notes: "A German version of this paper has been published in Glückauf 1955 91 (31/32) 869-878."