Data sources
<P>1. Kondratyev, A.A. (in prep.) Red Data Book for the Russian Far East.
<P>2. Portenko (1981): Birds of the Chukchi Peninsula and Wrangel Island Vol 1. 446p.


<P>3. Tomkovich, P. S. (1992b): Spoon-billed Sandpiper in north-eastern Siberia. 
  Dutch Birding 14:37-41 
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