In 1974, I sent the editor a home-made Christmas card summarizing most of what was known about word squares to that time. To my surprise, he published it as "A Survey Of Small Squares" in the May 1975 Word Ways, along with several additions for which he gave me credit.
"A Word Square Update,"
Word Ways: Vol. 16
, Article 10.
Available at: https://digitalcommons.butler.edu/wordways/vol16/iss4/10