Primary publication: doi.org/10.1126/science.6612338
Publication text or primary record: sanlab.psych.ucla.edu/wp-content/uploads/sites/31/2016/03/Ekman_1983_Science.pdf
Primary research: doi.org/10.1037/h0030377
Publication or author-hosted text: pubmed.ncbi.nlm.nih.gov/5542557/
Relevant evidence: Story-to-photograph judgments in New Guinea.