Gregory, P. H. <br/><br/>
The microbiology of the atmosphere / 
P. H. Gregory 
 - 2nd ed. 
 - Aylesbury, England :  Leonard Hill,  1973 
 - 377 p. : ill. ;  24 cm. 
<br/><br/>Bibliography : p. 309-346 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology