Columbia subject headings:
Harvard subject headings:
Birds--Conservation--South America.
Birds--Geographical distribution--Atlases.
Birds--Migration--North America--Atlases.
Shore birds--South America--Geographical distribution.
Shore birds--South America--Maps.
Shore birds--Wintering--South America--Atlases.
Princeton subject headings:
Shore birds--Canada.
Shore birds--South America--Maps.
Shore birds--South America.