Cambridge, Mass.: Obtainable from Bird Dept., Museum of Comparative Zoology, Harvard University, 1995.

Cambridge, Mass.: Obtainable from Bird Dept., Museum of Comparative Zoology, Harvard University, 1991.

Cambridge, Mass.: Bird Dept., Museum of Comparative Zoology, Harvard University, 1988.

Cambridge, Mass.: Bird Dept., Museum of Comparative Zoology, Harvard University, 1997.

Cambridge, Mass.: Obtainable from Bird Dept., Museum of Comparative Zoology, Harvard University, c1993.

Cambridge, Mass.: Obtainable from Bird Dept., Museum of Comparative Zoology, Harvard University, 1989.

Cambridge, Mass.: Obtainable from Bird Dept., Museum of Comparative Zoology, Harvard University, 1994.

Cambridge, Mass.: Bird Dept., Museum of Comparative Zoology, Harvard University, 1982.