Does anyone have copies of Volumes 3 and 4 of Gray Kronk's Cometography that they would be willing to sell? I have revived my study of the historical evolution of short period comet orbits (with a much more accurate orbit integrator), and these two volumes would be invaluable for my research. I already have Volumes 1 and 2, but I am not currently able to afford the £150-£200 price tag for subsequent volumes online.
Alternatively, I have copies of Meteor Showers & Their Parent Comets (Peter Jenniskens) and The Japanese & Indian Space Programmes (Brian Harvey) that I would be prepared to part exchange if required. Both of these are in excellent condition.
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