The phrase "also includes a substantial" is correct and usable in written English.
It can be used when you want to indicate that something is part of a larger group or category and that it is significant in size or importance.
Example: "The report also includes a substantial amount of data that supports our findings."
Alternatives: "also comprises a significant" or "also contains a considerable".
The sale also includes a substantial selection of photographs by Helmut Newton, as well as works by Richard Avedon, Irving Penn, Robert Mapplethorpe, and Herb Ritts.
The piece, which gives a lengthy description of the maneuvers and confrontations between the American Army and the British forces, also includes a substantial biographical sketch of Washington and his relative inexperience as a general: Washington believed that most Americans overrated his abilities as a soldier.
Blue Shift also includes a substantial section dedicated to keeping a major character in the story safe from enemy characters, and escorting him to a specific location.
But it also includes a substantial body of immigrants--namely Muslims--whom Caldwell regards as posing "the most acute problems" on account of their religion (an issue never mentioned by Powell in his speeches).
In contrast with the initial reports, we demonstrate that the Th17 phenotype is not confined to CD4+ effector cells but also includes a substantial number of naïve cells (CD45Ra) [11].
The transformation into a diazotrophic culture therefore also includes a substantial metabolic reprogramming of the vegetative cells [ 7].
This acquisition will also include a substantial contribution from the application of Conifer's capabilities to Vanguard's operations.
Interestingly, the CGIs that were positive for all the features associated with ATRX binding also included a substantial number of imprinted DMRs.
This investigation also included a substantial proportion (34.8%) of professionals in their first five years of clinical work, the timeframe in which the majority[ 5] and often most serious [ 16] WRMD occur.
For identification of the source populations of the CSE European samples and the two German samples, we also included a substantial number of European and American samples in our analyses.
