Principles of Neurodynamics
Rosenblatt gathered perceptron theory into a book: multilayer schemes, the convergence theorem, the limits and the open questions.
Why it matters
The full statement of the 1960s connectionist programme, and the main text Perceptrons was written against seven years later.
The book covers more than the single-layer case: Rosenblatt considers perceptrons with several layers and cross connections, and admits outright that no training rule exists for them. That gap, rather than the single-layer limitation itself, is what stayed unresolved until the 1980s.