To obtain such positron microbeam, it is necessary to use objective lenses, which are commonly used in the electron microscopy. We also attempted to form the positron microbeam using a positron beam for the positron diffraction experiment and a SEM optics [6]; [7] ; [8].
Publicly Traded Companies that Benefited from Forced or Slave Labor, 1929-1945 CalPERS
They brought along with them a system of forced labor called the encomienda. An encomienda was a means of giving to a Spaniard a restricted set of property rights over Indian labor (Yeager, 843). The Crown in Spain gave this to the Spaniard.