In autumn 1970, Czech mycologists had the opportunity to meet Prof. Dr. Rolf Singer during his visit to Czechoslovakia. A brief account is given of the excursion to the Karlštejn region with Prof. Singer, including reflections on his previous visit in 1930 and his work on Russula.
Kotlaba F. (1971): Excursio mycologorum bohemicorum in silvas „Karlštejnsko“ dictas. – Česká Mykologie 25(1): 60–63.
