Charles Pickering, Arthur Searle Oli Photometric Measurements of the Variable Stars B Persei and DM. 81>0 25, Made at the Harvard College
![Charles Pickering, Arthur Searle Oli Photometric Measurements of the Variable Stars B Persei and DM. 81>0 25, Made at the Harvard College](https://r.kelkoo.com/resize.php?country=se&merchantId=100565793&categoryId=5101&trackingId=96964074&width=300&height=300&image=https%3A%2F%2Fm.media-amazon.com%2Fimages%2FI%2F41tR6mz2ROL._SL500_.jpg&sign=QMon7y6fe_neP5fLFzFm3BzMFz1xfhptpSl3oOj2naM-)
Photometric Measurements of the Variable Stars B Persei and DM. 81>0 25, Made at the Harvard College
Photometric Measurements of the Variable Stars B Persei and DM. 81>0 25, Made at the Harvard College