https://dds.las.ac.cn/service/document?appId=a1vacbnPuv9qJRzJvdNXfsesj9JbIa6e&appKey=sPBA4vANLzjnW1k5eufEcc4k7dxfNraW&ts=1763009415458&signature=06e94521e1a824ba1620218067cf19c5&articleTitle=Developments+in+Geophysical+Exploration+Methods%E2%80%944&articleAuthor=A.A.+Fitch&publicationTitle=Developments+in+Geophysical+Exploration+Methods%E2%80%944&language=&publicationType=1&publishYear=1983&isn=9780853341741&publisher=Springer+Netherlands