TY  - RPRT
TI  - An accurate reference system for historadiography.
AU  - J J CLEMMONS
AU  - T C WEBSTER
PY  - 1953
DO  - 10.1016/0006-3002(53)90083-3
UR  - https://pubmed.ncbi.nlm.nih.gov/13105667/
ID  - 13105667
ER  -