Person · 1974 CEHelen McGregorAlso known asHelen McGregor (mwanajiolojia)Helen V McGregorHelen V McGregorHelen V McGregorHelen V McGregorహెలెన్ మెక్ గ్రెగర్ (భూగర్భ శాస్త్రవేత్త)archival plate · Helen McGregor · placeholderThis entry is a stub. The Library is awakening — a longer account is being written.Connected to6 links to entries not yet ingested in the Library.