S.  Schaller, Thayer, P., and Hanson, S., ?Maine horseshoe crab (Limulus polyphemus) spawning surveys, 2003?, Report to Maine Department of Marine Resources, Bar Mills Ecological, Buxton, MEReport to Maine Department of Marine Resources, Bar Mills Ecological, Buxton, ME, 2004.

S.  Schaller, Thayer, P., Hanson, S., LaTulippe, S., and Solet, E., ?Maine horseshoe crab (Limulus polyphemus) spawning surveys, 2004?, Report to Maine Department of Marine Resources, Bar Mills Ecological, Buxton, MEReport to Maine Department of Marine Resources, Bar Mills Ecological, Buxton, ME, 2005.