Occurrence and lack of transmissibility of gonadal neoplasia in softshell clams, Mya arenaria, in Maine (USA) and Atlantic CanadaBruce J. Barber, Gregory S. MacCallum, Shawn M. C. Robinson and Sharon McGladderyAquat. Living Resour., 15 5 (2002) 319-326DOI: https://doi.org/10.1016/S0990-7440(02)01186-5