BARTLE, K. Et Al. 1992. NEW DEVELOPMENTS IN COAL EXTRACTION. ERDOL & KOHLE ERDGAS PETROCHEMIE , vol.45, no.11 , 442.

BARTLE, K., VAYISOGLU, E., & FRERE, B., (1992). NEW DEVELOPMENTS IN COAL EXTRACTION. ERDOL & KOHLE ERDGAS PETROCHEMIE , vol.45, no.11, 442.

BARTLE, KD, E VAYISOGLU, And B FRERE. "NEW DEVELOPMENTS IN COAL EXTRACTION," ERDOL & KOHLE ERDGAS PETROCHEMIE , vol.45, no.11, 442, 1992

BARTLE, KD Et Al. "NEW DEVELOPMENTS IN COAL EXTRACTION." ERDOL & KOHLE ERDGAS PETROCHEMIE , vol.45, no.11, pp.442, 1992

BARTLE, K. VAYISOGLU, E. And FRERE, B. (1992) . "NEW DEVELOPMENTS IN COAL EXTRACTION." ERDOL & KOHLE ERDGAS PETROCHEMIE , vol.45, no.11, p.442.

@article{article, author={KD BARTLE Et Al. }, title={NEW DEVELOPMENTS IN COAL EXTRACTION}, journal={ERDOL & KOHLE ERDGAS PETROCHEMIE}, year=1992, pages={442} }