The plant self impressions prepared by Humboldt and Bonpland in tropical America / 
H. Walter Lack. 
<br/><br/> In: Curtis's Botanical Magaine, v. 18, pt. 4, 2001, pp. 218-228. Ill. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Humboldt, Alexander von, 1769-1859. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nature prints.<br/>Botanical illustration--Technique.