Complex sentence: In 1962 he was involved in building a road on Ester Dome for Geophysical Institute of University of Alaska, Fairbanks and in 1963 Krejci erected antenna on UAF Minitrack for Werner von Braun rocket program.
Split into simpler sentences: In 1962 he was involved in building a road on Ester Dome for the Geophysical Institute of University of Alaska, Fairbanks. In 1963 Krejci erected the antenna on UAF Minitrack for Werner von Braun rocket program.