A handbook of the principal trees and shrubs of the Ancon and Balboa Districts,  Panama Canal Zone, subdivided into sections according to location of plants. 

 - [Washington]  1925. 
 - 1 p. l., 7-97 p.  32 (i.e. 33) pl., map.  26 cm. 
<br/><br/> On cover: Trees and shrubs of Ancon and Balboa Districts, Canal Zone.  Preface signed: Holger Johansen.  Includes index. 
<br/><br/><label>LCCN: </label>agr25000787  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--Panama.
<br/><br/><label>LC Class. No.: </label>QK221  / .A6