Tory Peterson, Roger. <br/><br/>
A fiel guide to wildflowers:  northeastern and north-central north america 
por Roger Tory Peterson and Margaret Mckenny 
 - Boston, USA. :  Houghton Mifflin Company,  1968 
 - xxviii, 420 p. : .ills 
 - The Peterson field guide series  17 .
 - The Peterson field guide series  17 .
<br/><br/><label>LCCN: </label>98397 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Flores--E.U.A.<br/>Flores--Identificación.
<br/><br/><label>Dewey Class. No.: </label>582.130446373  / P44