RT Journal Article SR Electronic(1) A1 Ladd, D. Robert YR 2015 T1 The American Four-Level Analysis of Intonation Contours: Historical postscript JF Historiographia Linguistica VO 42 IS 1 SP 119 OP 137 DO https://doi.org/10.1075/hl.42.1.07lad PB John Benjamins SN 0302-5160, AB , UL https://www.jbe-platform.com/content/journals/10.1075/hl.42.1.07lad