The phrase "a number of unspecified" is correct and usable in written English.
It can be used when referring to an indeterminate quantity or amount of something without specifying the exact number.
Example: "The report indicated that a number of unspecified issues were affecting the project's timeline."
Alternatives: "several unknown" or "various unspecified".
He stressed that a number of unspecified enemies had "united themselves against Muslims" and that fighting them was obligatory.
The two men, like the nuns, have denied the charges of complicity in specific murders and of responsibility in a number of unspecified deaths.
A8 Delay on Missile Defense Defense Secretary William S. Cohen postponed his recommendation to President Clinton on whether to move ahead with a limited national missile defense, citing a number of unspecified "difficult issues" that must still be resolved.
Mr. Bellow, who has spent a fair share of his literary life writing about a certain type of American Jewish man's preoccupation with ambition, women, ideas and death, is still preoccupied with all of the above, and still writing about them daily, working on what he says are a number of unspecified projects.
The Treasury Department confirmed it would sell 7.7 billion common shares of Citigroup throughout 2010 "in an orderly and measured fashion," depending on a number of unspecified factors.
According to the French film gala's official website, the film will be released in France and a number of unspecified cities around the world on the same day.
Searches were also conducted on a number of other unspecified locations, she said.
Britain's Tui Travel, which owns six European airlines including Thomson Airways, said its plane turned back during a flight from England to Florida and had a small number of unspecified components replaced.
Conversely, a greater number of unspecified codes in the record could indicate lack of detail and potentially lack of validity.
A large number of unspecified measures were found, mainly due to poor reporting of study methods precluding the authors of this review being able to identify the measure used.
At Hearst Linley will take on a number of as yet unspecified "special projects".
