(1949). Petrographic analysis of coal by the particle count method.
Chicago Style (17. basım) AtıfPetrographic Analysis of Coal by the Particle Count Method. 1949.
MLA (9th ed.) AtıfPetrographic Analysis of Coal by the Particle Count Method. 1949.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..