1. Given , P. H. and Yarzab , R. F. ( 1975 ). Problems and solutions in the use of coal analyses . Technical Report No. 1, U.S. EROA, FE-0390–1 , Pennsylvania State University , Pennsylvania .
2. Greene , F. T. and Radolovich , G. ( 1975 ). Molecular beam mass spectrometric studies of laser plumes formed at atmospheric pressure . Paper presented at the 23rd Annual Conference on Mass Spectrometry and Allied Topics, May 25 through 30 , Houston , Texas .
3. Howard , J. B. ( 1965 ). Mechanisms of ignition and combustion in flames of pulverized bituminous coal . Ph.D. thesis , The Pennsylvania State University , University Microfilms No. 65–14 , 763 .