Pahlman, J. E. <br/><br/>
Safe cleaning of State of Maine filters using EDTA-type chelating agents / 
by John E. Pahlman and Daniel N. Tallman. 
 - Pittsburgh, Pa. :  U.S. Dept. of the Interior, Bureau of Mines,  1986. 
 - 12 p. :  ill. ;  28 cm. 
 - Information circular ;  9095 .
 - Information circular (United States. Bureau of Mines) ;  9095. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Filters and filtration.<br/>Ethylenediaminetetraacetic acid.<br/>Ore dressing.<br/>Calcium carbonate.
<br/><br/><label>LC Class. No.: </label>TN295  TN535  / .U4 no. 9095 
<br/><br/><label>Dewey Class. No.: </label>622 s  669/.22�19