Ammonia nitrogen and kjeldahl nitrogen in environmental waters  [kit] : 

 - America :  Fairfield :  American Institute of Biological Sciences [production company] ;  Communication Skills Corporation [distributor],  1976 
 - 2 sound cassettes, 2 film strips, 2 study guides, 67 slides ;  in container, 22 X 15 X 5 cm 
 - Ammonia nitrogen and kjeldahl nitrogen in environmental waters [kit] ;  part 1-2 .
<br/><br/> How to determine ammonia in natural waters and wastewaters -  How to determine total kjeldahl nitrogen in natural waters and wastewaters  part 1.  part 2. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ammonia