Disgrifiad
Collection of material produced by Derek Parker, relating to the construction of Clywedog Dam, including a report and a set of digital images copied from slides originally produced by Mr Parker.
Cofnod Casglu
DPCD - Derek Parker Clywedog Dam Collection
Cyfrwng
One box and 227MB of digital data. Text, Photo.
Cychwynnwr
Derek Parker, Halcrow Group Limited
