Seeds of woody plants in the United States 
The United States Departament of Agriculture Forest Service 
 - viii, 883 paginas  ilustraciones  27 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plantas leñosas<br/>Semillas--biología
<br/><br/><label>Dewey Class. No.: </label>631.521  / EUA 1974