In his book he has his main portion of what a counterpoise is in the Low Frequency section of the book, which covers 30 kHz to 300 kHz frequencies. He also has some information in the Medium Frequency range, which covers 300 kHz to 3 MHz. It is absent from the High Frequency antennas portion of the book entirely.
I have read some sources that show a counterpoise being used for 160 and 80 meters. That being said, in every antenna book up to the 10'th edition, and I believe all the way up to the 12'th edition as that is when that "series" of the books ends, there is a good description in the "160 Meter Antennas" chapters. In the 13'th edition there are two sentences on the subject, and those sentences are open to interpretation. This is one of the books that Cebik referred to in his article with the following text:
The 13'th edition is also the last of the smaller book versions before moving to the larger format for the 14'th edition. I don't know about the 14'th and 15'th editions, but can say for sure that the 16'th edition has a good description that is touched upon in both the "Antenna Fundamentals" and the "Effects of the Earth" chapters.
Unfortunately the 13'th edition, with its lack of any real description is also the single longest running version of the book, being the latest version of the book available for six years. This was odd as there are even some years that consecutive versions of the book was released (example, 6'th edition copyright 1954, 7'th edition copyright 1955, 8'th edition copyright 1956)
In the 16'th edition of the ARRL Antenna Book, there was an experiment for a counterpoise for between 27 MHz and 30 MHz with 64 radials tested 5 feet above the ground in a 20 x 20 foot square area. I'll see if the pictures on that page scan fairly well, (the page is kinda tore up, that is what I get from a used book that cost me $5.00), and if they turn out I'll post them up with some of the accompanying text.
The DB