1. The reliability of head film measurements. Landmark identification;Baumrind;Am. J. Orthod.,1971
2. Measurements on radiographs;Björk;J. Dent. Res.,1962
3. The accuracy of tracings from cephalometric lateral skull radiographs;Broadway;J. Dent. Pracl.,1962
4. Error in X-ray cephalometry;Carlsson;Odontol. Tidskr.,1967
5. Reliability of measurements from cephalograms at the Burlington Orthodontic Research Centre;Hatton;J, Dent. Res.,1958