Ground Power magazine is primarily a pictorial publication, with very little in the way of anything that could be described as an article. Each issue, which generally focuses on two to four different themes, is 144 pages of primarily b/w photos, one or two to a page, with Japanese captions. These features can run for several issues, hence the "(2)" or other numbers following some story names. If you know what you are looking at, these are extremely valuable reference books. If you don't, the lack of English captions could make things a bit difficult.
Issue #156 covers the US armored car Stryker, the WWII Japanese Army Type 89 Medium Tank (2), and German softskins during WWII (5). All text is in Japanese.