TY  - SER
AU  - Daniels,Eric
AU  - Aronson,James
AU  - Altaner,Stephen
AU  - Clauer,Norbert
TI  - Late Permian age of NH4-bearing illite in anthracite from eastern Pennsylvania: temporal limits on coalification in the central Appalachians
SN  - 00167606
N1  - bibliogr. p. 766
ER  -