TY  - RPRT
TI  - A method for analyzing the trend in visibility.
AU  - G C HOLZWORTH
AU  - J A MAGA
PY  - 1960
DO  - 10.1080/00022470.1960.10467953
UR  - https://pubmed.ncbi.nlm.nih.gov/13715623/
ID  - 13715623
ER  -