1. Radiotelemetry of electrograms and body temperature from surgically implanted transmitters;Essler;Stud. nat. Hist. Iowa Univ.,1964
2. Monitoring heart rates and body temperatures of unrestrained mammals by radio transmitters;Essler;Anat. Rec.,1960
3. Monitoring heart rates and body temperatures of unrestrained mammals by radio transmitters;Essler;Bull. Ecol. Wildlife Telemetry,1960
4. Determining avian ECG and respiration with a single-channel radio transmitter;Grant;J. appl. Physiol.,1971
5. Telemetry of ECG and respiration from the same pair of electrodes;Hanish,1962