AMERICAN RELATIVE SUNSPOT NUMBERS:  Final Monthly Means

The data in the file SUNSPOT.DAT is derived from the following source:

AAVSO - Solar Division
4523 Thurston Lane - Apt. 5
Madison, WI  53711-4738

This material is NOT in the public domain.  Permission to copy this dataset
must be obtained from AAVSO.  However, they were extremely cooperative,
and it appears likely that they will continue to willingly share their data.
In particular, Peter O. Taylor was very kind in his fast and courteous
response to my request for sunspot data.

