Krug, R. (1998). Usmle step 1 Review Series: Behavioral Sciences U S Health Care Biostatistics & Epidemiology <i>en</i>.
Chicago-čujuhus (17. p.)Krug, Ronald. Usmle Step 1 Review Series: Behavioral Sciences U S Health Care Biostatistics & Epidemiology <i>en</i>. 1998.
MLA-čujuhus (9. p.)Krug, Ronald. Usmle Step 1 Review Series: Behavioral Sciences U S Health Care Biostatistics & Epidemiology <i>en</i>. 1998.
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