Pauk, Walter.
Main idea : level L : one hundred passages with questions for developing concentration and the skill of finding the main idea, one of the six essential categories of comprehension /

. - Lincolnwood  : Jamestown Publishers,  1985 
. - 63 p.  23 cm. 
 - (Single skills )
<br/><label>  ISBN: </label>0-8092-0394-9