From John Cobb field notebook: Oyster dyke at Poulsbo, Wash. June 1920 Prob. Prof. Kincaid *Subjects (LCTGM): Oyster industry--Washington (State)--Poulsbo *Subjects (LCSH): Oyster culture--Washington (State)--Poulsbo; Dikes (Engineering)--Washington (State)--Poulsbo Oyster industry--Washington (State)--Poulsbo