TY - RPRT TI - Organic petrology of Paleocene Marcelina Formation coals, Paso Diablo mine, western Venezuela: Tectonic controls on coal type AU - P.C. Hackley AU - M. Martinez PY - 2007 DO - 10.1016/j.coal.2006.05.002 UR - https://pubs.usgs.gov/publication/70031199 ID - 70031199 ER -