inboard bindings

Preferred label: 

Bindings in which the boards are attached to the bookblock by whatever means before the book was covered. Such books are also described as 'bound in boards'.

Pickwoad, The Interpretation... (1995)

Nicholas Pickwoad (1995), “The Interpretation of Bookbinding Structure: An examination of Sixteenth-Century Bindings in the Ramey Collection in the Pierpont Morgan Library”, The Library 17 (3), pp. 209–49.

Additional reference: 
p. 209 (modified)
Alternative label: 
bound in boards (bindings)
Broader concept: 
Broader partitive concept: 
Top concept: 
objects