Richardson, Charles H. <br/><br/>
The effect of hydrogen-ion concentration on the toxicity of nicotine, pyridine and methylpyrrolidone to mosquito larve  / 
by Charles H. Richardson and Harold H. Shepard 
 - 12 p. 
 - Díptera ; 2 .
<br/><br/> Sobretiro de : Journal of agricultural research 41 (4) : 337-348, 1930 Enc. con impresos similares 
<br/><br/><label>LCCN: </label>206726 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dípteros -- colecciones de escritos <br/>Insecticidas <br/>Iones hidrogenados -- concentraciones
<br/><br/><label>Dewey Class. No.: </label>PA-C 595.77 D5