Nelson, R.H. <br/><br/>
Conversión tables and equivalents for use in work relating to insect control / 
by R.H. Nelson 
 - EUA :   Department of Agriculture 
 - 21 p. 
<br/><br/><label>LCCN: </label>205340 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Control de plagas -- modelos matemáticos