Books by Petr Hadrava
The stars in the classical and
The stars in the classical and medieval traditions
Kepler's heritage in the space
Kepler's heritage in the space age
Stellar spectroscopy at Ondřej
Stellar spectroscopy at Ondřejov Observatory
Interacting astronomers
Interacting astronomers
Ondřejovská hvězdárna 1898-199
Ondřejovská hvězdárna 1898-1998