Robertson, R A <br/><br/>
A Contribution to the Chemistry and Physiological Action of the Humic Acids.  [electronic resource] 

 -  The Biochemical journal  1907 
 - 458-480.3 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0264-6021 
<br/><br/><label>Standard No.: </label>10.1042/bj0020458  doi