Symposium on Physico-Chemical Studies of Coal Macerals [held during the] second International Conference on Coal Science, Valkenburg, The Netherlands, 1-4 May 1957
Subtitle: preprints.
Contributors: International Conference on Coal Science, (2nd : 1957 : Valkenburg)
Publisher: [s.n.]
Published: 1957
Place of publication: [s.l.]
Language: mul
Notes: Cover title.