Pre-1975 JCR data?

Loet Leydesdorff loet at LEYDESDORFF.NET
Fri Mar 28 15:20:34 EST 2003

Dear Eric,

Perhaps, you can use the DIALOG installation of the SCI to search on
journal names and then retrieve number of hits for cited/citing journal
names. I remember that I did that once in the 1980s. It provides you
with lower numbers of journal-journal relations because it is based on
unique article relations and not on citations. However, this data is
structurally equivalent to the real citation data, for example, in terms
of the factor structure. I checked that once for chemical physics, but I
don't remember where I published that (as a footnote).

With kind regards,


> -----Original Message-----
> From: ASIS&T Special Interest Group on Metrics
> [mailto:SIGMETRICS at LISTSERV.UTK.EDU] On Behalf Of Ackermann, Eric
> Sent: Friday, March 28, 2003 7:49 PM
> Subject: [SIGMETRICS] Pre-1975 JCR data?
> Does anyone know if the journal citation data normally found
> in ISI's Journal Citation Reports is available for pre-1975
> years? If my information is correct, the JCR started in 1975.
> I am doing research that involves the bibliometric analysis
> of a series of journals from 1968-1972. Unfortunately, I do
> not have the resources to construct my own journal citation
> data for that time period. Any help or insight or suggestions
> provided will be greatly appreciated!
> Regards,
> Eric
> **********************************
> Eric Ackermann
> Reference/Instruction Librarian
> McConnell Library
> Radford University
> PO Box 6881
> Radford, VA  24142
> Email: egackerma at
> Phone: 540-831-5688

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