Martinez-Pardo, R. (1981): An unknown upper Miocene-lower Pliocene regional hiatus along the marginal Northeast Pacific?. Osaka Mus. Nat. Hist., Osaka, Japan, In: Ikebe, Nobuo (editor), Chiji, Manzo (editor), Tsuchi, Ryuichi (editor), Morozumi, Yoshiro (editor), Kawata, Tokiko (editor), Proceedings of IGCP-114 international workshop on Pacific Neogene biostratigraphy, 124-126, georefid:1983-046718