Courtenay, L.T. "Where Roof Meets Wall: Structural Innovations and Hammer‐Beam Antecedents, 1150–1250." Annals of the New York Academy of Sciences (1985).

Courtenay, L.T. "Where Roof Meets Wall: Structural Innovations and Hammer‐Beam Antecedents, 1150–1250." Annals of the New York Academy of Sciences (1985).