Hydro-extractors;  their safe construction and equipment. 

 - Geneva  [Printed by Atar]  1929. 
 - viii, 102 p.  illus.  24 cm. 
 - Studies and reports, Series F, 2d section (Safety)  no. 3 .
<br/><br/> At head of title: International Labour Office.  "Prepared by Mr. Massarelli, assisted by Mr. Scotti."--Pref. 
<br/><br/>Bibliography: p. [92] 
<br/><br/><label>LCCN: </label>l  29000081  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drying apparatus.<br/>Machinery--Safety appliances.
<br/><br/><label>LC Class. No.: </label>HD4813  / .I4 ser. F, 2d. sect., no. 3