Some questions on the bitumen and humic acid content of Hungarian Tertiary Brown Coals.
Foreign title:
Hazai Harmadkofi Barnakoszenek Bitumen es Huminsav Tartalmanak Nehany Kerdese.
Reference:
Kedves,E. et al. (1962)
Some questions on the bitumen and humic acid content of Hungarian Tertiary Brown Coals. [ Hazai Harmadkofi Barnakoszenek Bitumen es Huminsav Tartalmanak Nehany Kerdese. ] A Szegedi Pedagogiai Foiskola Evkonyvebol,(Szeged)
P. 229- 238