TY  - RPRT
TI  - Sleep patterns in college students: gender and grade differences.
AU  - Ling-Ling Tsai
AU  - Sheng-Ping Li
PY  - 2004
DO  - 10.1016/s0022-3999(03)00507-5
UR  - https://pubmed.ncbi.nlm.nih.gov/15016583/
ID  - 15016583
ER  -