Hydrogeology and engineering geology of sinkholes and karst - 1999 :  proceedings of the Seventh Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst, Harrisburg-Hershey, Pennsylvania, 10-14 April 1999 / 
edited by Barry F. Beck, Arthur J. Pettit & J. Gayle Herring ; sponsored by P. E. LaMoreaux & Associates, Inc. 
 - Rotterdam :  A. A. Balkema,  1999 
 - ix, 478 p. :  ill. ;  29 cm. 
<br/><br/><label>ISBN: </label>9058090469  RM474.36 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sinkholes--Environmental aspects--Congresses<br/>Karst--Environmental aspects--Congresses<br/>Hydrogeology--Congresses<br/>Engineering geology--Congresses