TY  - RPRT
TI  - Pathways of progress.
AU  - R H Allred
AU  - P O Werstlein
AU  - T A McBride
PY  - 1981
DO  - 10.1177/216507998102900403
UR  - https://pubmed.ncbi.nlm.nih.gov/6908680/
ID  - 6908680
ER  -