Zeitschriften, I'iiili t 8.er. : Z 83 
Enc;land 

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1.:0;;/a -enp;lneer3-J °urna • -.1~1e ~. ,0J ö.::.-nSlneer 
Jou:::,nal. Vol. 38. ~~1-?2. -~hatllal:l: The 6nstitutlon 
of Etoya1 j.<.:nglneers 192/+-1938. 8