SYSTEM OF DESCENT: How kinship is traced over the generations
BILATERAL: A System of reckoning descent that counts both the mother's and the father's side.
PATRILINEAL: A system of reckoning descent that counts only the father's side.
MATRILINEAL: A system of reckoning descent that counts only the mother's side.
KINSHIP- READINGS
http://anthro.palomar.edu/kinship/default.htm