Wakker, B. Interstellar neutral hydrogen at high velocities B. Wakker - Groningen Rijksuniversiteit Te Groningen 1959 - 249p. Subjects--Topical Terms: Astronomy and Astrophysics ThesaurusInterstellar MatterNeutral HydrogenPh.D. Thesis Universal Decimal Class. No.: 043:524.522 / WAK