TI - PRimary studies for nurses. PT - JOUR DP - 1909 TA - Journal of the American Medical Association pages = {474}, VI - LIII IP - 6 AID - 10.1001/jama.1909.02550060050024 [doi] 4100 - http://dx.doi.org/10.1001/jama.1909.02550060050024 SO - Journal of the American Medical Association August 7, 1909 LIII(6):474