Manual on methods for the assessment of secondary productivity in fresh water 
edited by W. T. Edmondson and G. G. Winberg 
 - Oxford  Blackwell Scientific Publications  1971 
 - xx,358p.; 21cm.- 
 - IBP handbook;no.17 .
<br/><br/><label>Dewey Class. No.: </label>574.52632  / EDM