Slide Rules - Peter Holland - Rechenschieber Slide Rules - Peter Holland - Rechenschieber http://www.peterholland.de/
Giovanni Breda's Slide Rule Collection Recreation, Antiques, Medical and Scientific, Slide Rules - Giovanni Breda's Slide Rule Collection. Giovanni Breda shows his collection. http://www.sliderule.it
IM2001 - 7th International Meeting for Slide Rule and Calculating Machine Collectors Rechenschieber.org - Seite der deutschsprachigen Rechenschieber-Sammler https://www.rechenschieber.org/