1. Preliminary estimates of production of Pennsylvania anthracite and of beehive coke, May-Nov. 1949, monthly preliminary estimates anthracite and beehive coke no. PCC 5-49 to PCC 11-49. Bookmark Corporate/Agency Authors: Mines Bureau and Interior Dept. Publisher: Mines Bureau Date: [1949.] SuDoc number: I 29.50:949/5-11