KEY : links to Bird Observer online edition links to Bird Observer pdf edition (registered users only)
April 1979, Vol. 7, No. 2 A Guide to Birding on Martha's Vineyard Richard Sargent Field Identification Notes: The Two Waterthrushes Joseph Leverich The Winter Season: November 1978-February 1979 ^ top
links to Bird Observer online edition 
links to Bird Observer pdf edition (registered users only)