Looking for advice on papers

[Serdgent]

Hello

I am currently working on a research projet on hull-Propeller interaction on catamarans.

I read that these books would contain information on wake fraction and thrust fraction coefficients (named as 'w' and 't')

Hadler, J. B. and Cheng, H. M., "Analysis of Experimental Wake Data in Way of the Propeller Plane of Single and Twin Screw Ship Models", SNAME Transactions, Vol. 73. (1976).

and

S.A. HArvald, "Resistance and Propulsion of Ships" Wiley 1983

Does anyone know about these books ? Are they worth buying ? Do you know where I could get them from ?

And if anyone knows more litterature on that subject or would have some knowledge to share on that, that would be great


Thx

Simon