How to measure pH with chemical indicators and a simple pH meter  [kit] / 
American Institute of Biological Sciences 
 - 1 sound cassette, 1 filmstrip, 31 slides ;  in container, 15 X 22 cm. +  1 study guide 
 - General Skills series .
 - General Skills series  [kit] .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrogen-ion concentration.<br/>Indicators and Reagents.