The phrase "additional collection" is correct and usable in written English.
It can be used when referring to an extra or supplementary gathering of items, data, or resources.
Example: "The report includes an additional collection of data that supports the findings."
Alternatives: "supplementary gathering" or "extra set".
An additional collection (collected at diagnosis) of stages III and IV melanoma tissues (MIA-tissue) were obtained via a database of prospectively recruited melanoma cases, presenting to the Melanoma Institute Australia (MIA) and affiliated private hospitals, which has been maintained since 1967.
Similar analytical units, at Central Command, in Tampa, and at the International Security Assistance Force, in Kabul, sorted battlefield and all-source intelligence, designated subjects for additional collection, and conducted pattern analysis of relationships among terrorists, couriers, and raw data collected in the field.
They are aimed at infiltrating stormwater to prevent additional collection and treatment through rainwater systems.
Access to additional collection materials, located in Widener Library Room C, is by appointment only.
Additional collection management support was provided by Columbia University work-study student Haruna Otsuka.
They were implemented in a hypothetical prototype mobile phone via a hotlist (an additional collection of quickly accessible items).
Under most circumstances, the goal of worm grunting is to rapidly collect the emerging earthworms and then move to another, adjacent site for additional collections.
Additional collections are available via the Library of Congress/World Cat (http://ow.ly/8aPAJ).
Alexander Agassiz acquired a number of important additional collections in the 1880's.
Additional collections may also be added, e.g. ex for Rare Books & Special Collections (Firestone), gax for Graphic Arts, and rcppw for rare Architecture Library materials.
All of the news titles in Gale NewsVault, below, are included plus additional collections with partial newspaper content.
