Piyamongkol W, Anantachote A. The Study of Correlation between Sound Provoked Test (SPT) and Nonstress Test (NST). Thai J Obstet Gynaecol [internet]. 1996 Dec. 1 [cited 2026 Sep. 28];8(4):295-9. available from: https://he02.tci-thaijo.org/index.php/tjog/article/view/92547