Brain, R. (1972). Into the primitive environment survival on the edge of our civilization. George Philip.
Dyfyniad Arddull ChicagoBrain, Robert. Into the Primitive Environment Survival on the Edge of Our Civilization. London: George Philip, 1972.
Dyfyniad MLABrain, Robert. Into the Primitive Environment Survival on the Edge of Our Civilization. George Philip, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.