TY - GEN AU - Herbert, Timothy D. AU - Fischer, Alfred G. TI - Milankovitch climatic origin of mid-Cretaceous black shale rhythms in central Italy KW - CLIMAS CRETACIOS KW - TEORIA MILANKOVITCH KW - 551.583.7 KW - med KW - fre KW - 523.31=323.8 ER -