PENNSOIL is the semi-annual newsletter of the Association.  All submissions are welcome!
July 2022
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Penn Soil, Volume XXIII No 1, February 1999
December 1999
May 1998
Penn Soil, Volume XIV No 1, February 1995
Penn Soil, Volume XVIII No 1, March 1994
Penn Soil, Volume XVI No 1, May 1992
Penn Soil, Volume X Issue 1, October 86
