High school biology :  a laboratory block on life in the soil / 
by D. Pramer. 
 - Boston :  Heath,  [c1965] 
 - Its Laboratory blocks for high school biology .
<br/><br/> Prepared by its Committee on Innovation in Laboratory Instruction. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology.<br/>Soil microbiology.