Ślawski was born on 25 January 1920 in Święcany, Poland, and he died 4 November 2008. He came from a family of six and graduated from the elementary school in Święcany. After completing school, he went into employment of his uncle in Siary working at a petroleum well.
Ślawski was born on January 25, 1920, in Święcany, Poland, and died on November 4, 2008. He came from a family of six and graduated from elementary school in Święcany. Following his education, he began working for his uncle in Siary at an oil drilling facility.