000 00443nam a22001217a 4500
008 230725b |||||||| |||| 00| 0 eng d
040 _aNational Science Library
_cNational Science Library
245 _aMedical subject headings:
_bTree structures 1972
_c/ National Library of Medicine Bethesda, Maryland 1972
260 _aWashington:
_bNational Library of Medicine,
_c1972
300 _a311p.
650 _aSubject headings
942 _2udc
_cREF
999 _c55007
_d55007