20162705 Chen Gang(Xinjiang Oilfield Company,PetroChina,Karamay 834000,China);Du Qizhen Shear-Wave Velocity and Density Estimation from PP-and PS-Waves Joint AVO Inversion(Fault-Block Oil&Gas Field,ISSN1005-8907,CN41-1219/TE,22(6),2015,p.729-734,9illus.,35refs.,with English abstract)Key words:AVO techniques