Potentiometric surface of the Upper Patapsco Aquifer in southern Maryland, September 1990 /

Julkaistu 1992

Potentiometric surface of the Magothy Aquifer in southern Maryland, September 1989 /

Julkaistu 1992

The difference between the potentiometric surfaces of the Magothy Aquifer of September 1975 and September 1990 in southern Maryland /

Julkaistu 1992

Potentiometric surface of the lower Patapsco Aquifer in southern Maryland, September 1990 /

Julkaistu 1992