C.L. Comar <br/><br/>
Radioisotopes in Biology and Agriculture 

 - 1st 
 - New york  McGraw- Hill   1955 
 - xiii, 481 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radioisotopes in Biology and Agriculture--Radioisotopes in Biology and AgricultureHealth PhysicsRadiation ProtectionBasic difficulties