TY - BOOK ID - 136102236 TI - A study of the Galactic Cluster Messier 67, based mainly upon the photographic magnitudes and the effective wave-lengths of 1153 stars. PY - 1945 PB - Antwerpen Standaard DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:136102236 AB - ER -