The following document was first received by the National Security Archive many years ago, but it is unclear when it was first declassified. The released version had many redactions.
So, in February of 2019, The Black Vault requested a Mandatory Declassification Review (MDR) of the document. In July of 2019, the below was released.
NSA COMINT REPORT: Capital Projects Planned in India, August 31, 1972 – Highlighted Version – [8 Pages, 2.2MB] – This version contains the highlighted information that is newly released, and no longer redacted.