1. Relationship of crown margins placement to gingival inflammation;Richter;J Prosthet Dent,1973
2. Marginal fit of gold inlay castings;Christensen;J Prosthet Dent,1966
3. An aid to evaluating the marginal fit of full crowns;Cardash;Quintessence Int Report No. 1832,1980
4. Statistical Theory and Methodology in Science and Engineering;Brownlee,1965
5. Metal Crowns;Gottlieb,1938