I'm trying to cite several old birth announcements that don't actually name the child, just the parents. An example would be this announcement for my grandfather and his twin sister's birth.
Born to Mr. and Mrs. Albert Garrison, June 2, twins, a boy and girl. Both mother and children are doing nicely.
"Newton [birth announcement for Clarence Garrison]," The Scranton (Pennsylvania) Republican, 8 June 1922, p. 13, col. 7; digital image, Newspapers.com (https://www.newspapers.com : accessed 12 February 2017).
Would it be appropriate to add [birth announcement for Clarence Garrison] in brackets as I did above? And if so, should it be placed elsewhere in the citation?