Ertel, Hans, 1904-1971.
Geophysical hydrodynamics and Ertel's potential vorticity : (selected papers of Hans Ertel) / compiled and edited by Wilfried Schrd̲er ; (with an introduction by Hans-J rgen Treder).
Geophysics.
Hydrodynamics.
Vortex-motion.
Schrd̲er, Wilfried.
International Association of Geomagnetism and Aeronomy. Interdivisional Commission of History.