send by Roman SUDZIK

Roman gave some information about his covers

both FDC's celebrate "The achievements of Police Science"

stamps are shown portraits of Polish historians: prof. Gerard Labuda, prof. Witold Kula and prof; Aleksander Gieysztor

stamps are shown:
- Prof. Edmund Biernacki (1866-1911), physician, neurologist, philisopher, discoverer of relationship between sedimentation rate of red blood cells and the general conditions of the organism
- Prof. Hilary Koprowski (1916-2013); virologist and immunologisdt active in USA, inventor of the wald's first effective live polio vaccine
- Prof. Wladyslaw Kunickki-Goldfinger (1916-1995), microbiologist, philosopher