TY - RPRT TI - Spinal headache and postconcussion headache; preliminary report. AU - B JUDOVICH AU - G R NOBEL AU - P POLAKOFF AU - W SAGEN PY - 1956 DO - 10.1016/s0002-9610(56)80119-0 UR - https://pubmed.ncbi.nlm.nih.gov/13354869/ ID - 13354869 ER -