Two NPB Umpire. Hidenosuke Shima (left) and Nobuaki Nidegawa (right). taken in 1956.
博友社 (Hakuyu-sha Co., Ltd.)
『<a href="https://ja.wikipedia.org/wiki/%E9%87%8E%E7%90%83%E7%95%8C" class="extiw" title="ja:野球界">野球界</a>』1956年8月号、博友社、1956年、p.126<br>"<i>THE YAKYUKAI (Baseball) </i>" August 1956 Issue, Hakuyu-sha Co., Ltd., 1956, p.126