82 ¥ we sy ~{ aA\th FIG. 13. RADIOACTIVITY OF WATER FROM 25 METER DEPTH IN THOUSANDS OF DISINTEGRATIONS PER MINUTE PER LITER.
82 ¥ we sy ~{ aA\th FIG. 13. RADIOACTIVITY OF WATER FROM 25 METER DEPTH IN THOUSANDS OF DISINTEGRATIONS PER MINUTE PER LITER.