Reading explorer 

 - 2nd ed. 
 - Boston, MA :  National Geographic,  <2015-2016> 
 - 3 v. :  col. ill., col. maps ;  28 cm. 
<br/><br/>Reading Explorer 1 / Nancy Douglas, David Bohlke -- Reading Explorer 2 / Paul MacIntyre, David Bohlke -- Reading Explorer 3 / Nancy Douglas, David Bohlke -- Reading Explorer 4 / Paul Macintyre, David Bohlke -- Reading Explorer 5 / Nancy Douglas, David Bohlke 
<br/><br/><label>ISBN: </label>9781285846859 (Level 1) 9781285846903 (Level 2) 9781285846910 (Level 3) 9781285846927 (Level 4) 9781285847047 (Level 5) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reading comprehension<br/>Discoveries in geography