Humphrey, Richard Lewis,  1869-1928. <br/><br/>
Organization, equipment and operation of the structural-materials testing laboratories at St. Louis, Mo. / 
by Richard L. Humphrey ; with preface by Joseph A. Holmes. 
 - Washington :  Govt. Print. Off.,  1908. 
 - xi, 84 p., [25] leaves of plates (1 fold.) :  ill., diagrs. ;  24 cm. 
 - U.S. Geological Survey bulletin ;  no. 329 .
<br/><br/> Issued also as House doc. no. 724, 60th Congress, 1st session. 
<br/><br/><label>LCCN: </label>gs 08000099  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Building materials--Testing.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 329