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- 82 supplement. 1984 Jun:4
- Available. 1979 Dec:3; 1982 Aug:3; 1986 Aug:5; 1988 Mar:4
- Available in PDF. 1996 May-Jun:3
- Available on Internet. 1993 May-Jun:7
- Bioethics chapter, revised. 1982 Nov:Enc<
- CHEMLINE chapter revision. 1979 Jun:App
- description. 1980 Jan:4
- index study, report of. 1981 Jul:5
- index, suggestions requested. 1980 Aug:9
- missing pages. 1987 Jan:6; 1987 Sep:enclosure
- no longer available free. 1982 Jul:5>
- PDQ - Chapter 25 - addition. 1982 Sep:Enc
- Price Increase. 1992 Jul-Aug:3
- replacement pages. 1982 Sep:Enc; 1982 Dec:Enc; 1985 Sep:4
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