1. Environmental sepsis;Walter;Mod Hosp,1958
2. Bacteriological factors in hospital sanitation procedures;Kundsin;Modern Sanitation Building Maintenance,1960
3. The floor as a reservoir of hospital infections;Walter;Surg Gynecol Obstet,1960
4. Measurement of the bacterial contamination on surfaces in hospitals;Hall;Public Health Reg,1964
5. Surface sampling application, methods, recommendations;Fincher,1965