This publishing activity & this textual material

Do the highlighted "This publishing activity" and "this textual material" both mean the books and catalogs that contain the works of war artists?

Context:

Because war art is so vast and still expanding, this book cannot possibly be comprehensive. It does not, for example, provide a complete bibliography on war art, although what it presents is extensive. The three main reasons for this selectivity are relatively simple. First, most writers have examined war art from a generally nationalistic and limiting viewpoint. There are books on British, Canadian, and Australian war art, not to mention South African, German, Japanese, and American. Many of these relate to official or commissioned programmes. In similarly nationalistic veins, the better known war artists have had exhibitions at the institutions housing their war pieces, with monographs and catalogues accompanying them. Second, many artists who choose war as a subject also select other topics. In general, their war art is part of a larger body of work and appears in books that cover all their endeavours. This publishing activity comprises a great deal of printed material overall. And this textual material is not a balanced literature. Third, other, less well-known artists choose war as their theme, but their work receives little attention. Virtually invisible to scholars and researchers, their contribution remains in archives.