1
Published: [Washington, D.C.], [American University, Foreign Area Studies], 1970
   
3
Published: Guatemala, Ed. del Ministerio de Educación Pública, 1953
   
8
   
10
Published: Minneapolis, Univ. of Minnesota Pr., 1940
   
13
   
15
   
16
   
17
   
19
Published: Ann Arbor, Mich., Museum of Zoology, 1963
   
20
Published: Köln, ai Guatemala Koordinationsgruppe, 1989
   

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