Morgenstern, E. K. <br/><br/>
Introgressive hybridization in red spruce and black spruce 

<br/><br/> Sobretiro de: Univ. Toronto Fac. Forestry. Tech. Rep. No. 4. pp. 1-46, 1964 
<br/><br/><label>LCCN: </label>40426 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hibridación vegetal.<br/>Picea mariana.<br/>Picea rubens.