Welch, Wayne W. <br/><br/>
Summary of research in science education for the years of 1968-69, secondary school level 
by  Wayne W.Welch 
 - Ohio  ERIC Information Analysis Center for Science, Mathematics & Environmental Education  1971 
 - 60p.;  28cm.- 
 - Science education information : research review series science paper; no. 7 .
<br/><br/><label>Dewey Class. No.: </label>507.2  / WEL