This suggested that backfile subscriptions could be cost effective means of providing content.
Heather MacDonald 2017, '“Just-in-Time” Unmediated Document Delivery Service Provides Fast Delivery, HelpsIdentify Collection Gaps, but Incurs Extra Costs', Evidence Based Library and Information Practicehttps://journals.library.ualberta.ca/eblip/index.php/EBLIP/article/view/29005. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)