1. Apparent points of contact between the daily course of the magnetic components of the earth together with certain solar elements and the diastolic pressure of human beings and the total count of their leucocytes;Alvarez;Puerto Rico J. Publ. Health and trop. Med.,1935
2. A day-to-day relationship between oxidative metabolism and world-wide geomagnetic activity;Barnwell;Biol. Bull.,1960
3. Magnetic and photic response in snails;Barnwell;Experientia,1961