Of a certain

certainly.

See also: Certain

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
Now, according to our definition, Tragedy is an imitation of an action that is complete, and whole, and of a certain magnitude; for there may be a whole that is wanting in magnitude.
Again, a beautiful object, whether it be a living organism or any whole composed of parts, must not only have an orderly arrangement of parts, but must also be of a certain magnitude; for beauty depends on magnitude and order.
By replacing knowledge with knowing and having/possessing knowledge with doing, PM can be viewed `as a process of becoming a member of a certain community'.