00758nam a2200217Ia 450000100060000000300050000600500170001100800410002801000170006903500200008604000130010604300120011907400100013108600200014124500390016126000540020030000240025461000840027865000890036271000890045155856BIBL20160527190100.0900404s1990    mdua     f   f00000 eng d  agp 90011253   a(OCoLC)21320053  aGPOcGPO  an-us---  a508-K0 aHE 20.3608:D 6200aDIRLINEbself-instructional guide.0 aBethesda, MDbNational Library of Medicinec1990.  a40 p.bill.c28 cm.20aNational Institutes of Health U.S.xData basesxHandbooks, manuals, etc.2Local 0aInformation storage and retrieval systemsxMedicinexHandbooks, manuals, etc.2Local20aNational Library of Medicine U.S.bSpecialized Information Services Division.2Local