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  1. 61
    Published 1991
    ...HF 5382.5 .N5 .P297...
    Journal
  2. 62
    Published 1989
    ...HD 7106 .N5 .P969...
    Journal
  3. 63
    Published 1994
    ...HV 5715.5 .A1 .S274...
    Journal
  4. 64
    Published 1982
    ...HA 4015 .A1 .T114...
    Serial
  5. 65
    ...HA 4553 .S797...
    Full text available from United Nations ESCAP: 2014
    Serial
  6. 66
    Published 1986
    ...HC 685 .Q1...
    Journal
  7. 67
    ...HA 13 .U58...
    Serial
  8. 68
    Published 1986
    ...HF 5833 .A938...
    Journal
  9. 69
    Published 1988
    ...HF 4031 .A1 .T763...
    Journal
  10. 70
    Published 1980
    ...HX 780.4 .C3 .C397...
    Journal
  11. 71
    Published 1973
    ...HG 52 .B863...
    Serial
  12. 72
    Published 1980
    ...HV 8477.5 .P057...
    Serial
  13. 73
    Published 1988
    ...HD 9578 .N54 .S544 .S544...
    Serial
  14. 74
    Published 1967
    ...HD 8039 .P152 .N5 .N532...
    Serial
  15. 75
    Published 1974
    ...HV 1492 .C2 .K26...
    Journal
  16. 76
    ...HD 9428 .N5 .P964...
    Serial
  17. 77
    Published 1977
    ...HC 625 .E5 .N532 n...
    Journal
  18. 78
    Published 1978
    ...HC 681 .K44...
    Journal
  19. 79
    Published 1985
    ...HQ 1865.5 .H572...
    Serial
  20. 80
    Published 1990
    ...HJ 3689.5 .A1 .R948...
    Serial