Dr. Lubos Kohoutek, Czech Astronomer, discovered comet named after him, signed | eBay
Luboš Kohoutek - Wikipedia
LD307 1973 Original Official NASA Photo PROFESSOR LUBOS KOHOUTEK CZECH ASTRONAUT | eBay
Lubos Kohoutek - Commemorative Sheet With First Day Cancellation Circa 1967 co-signed by: James A. Van Allen, Clyde William Tombaugh | HistoryForSale Item 217519