Squares Ending in 5 Occurrences of 2-Digit Pattern/Historical Note

Historical Note on Squares Ending in 5 Occurrences of 2-Digit Pattern
According to in his $1997$ book, this result is attributed to , in volume $6$ of the.

No online corroboration of this can be found online, as there appears to be no consolidated archive of this magazine.

The author of this page would give his right arm to have a copy of the entire series resting on a bookshelf in his study.