Answers are grounded in this paper and cite their sources.
The discovery of this list's 351 new variables was announced in Mitteilungen über Veränderliche Sterne. Here some more details are given, including epochs for short period and eclipsing variables and charts of the surroundings.
No takes yet. Share an insight, caveat, or question.
C. Hoffmeister (1966) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: