Communism in Czechoslovakia, 1948-1960

Human parasitology in Czechoslovakia.

--1993 Division of Czechoslovakia--

Founded in 1918, it united within its political framework the Jewries of the "historic countries" (Bohemia, Moravia, and part of Silesia), connected with the Hapsburg Empire from 1526 and under its direct control from 1620, and of Slovakia and Carpatho-Russia, an integral part of Hungary, from the tenth century. As of January 1, 1993, Czechoslovakia ceased to exist as a separate entity and its ...

The Introduction of Roof Bolting to U.s. Underground Coal Mines (1948-1960): a Cautionary Tale

Perhaps the most significant development in coal mine ground control during the last century was the introduction of roof bolting during the late 1940’s and 1950’s. From an engineering standpoint, roof bolts are inherently more effective than the wood timbers they replaced. Roof bolts promised to dramatically reduce the number of roof fall accidents, which then claimed hundreds of lives each ye...

Ecochemistry of Bhc in Czechoslovakia

The 'ecochemistry' of BHC and other chlorinated insecticides in soil, surface waters, in selected foodstuffs of plant and animal origin, in human milk and other human materials (fat and the uterus content after an artificial abortion), has been studied. The investigations were accomplished in three regions in Slovakia: two regions with an intensive predominating agricultural production and one ...

The fallacy of communism.