by G M K Madnani | .
by V T Raju | Vishnu Shankar Rao.
by United Nations Industrial Development Organisation(Vienna) | .
by K Puttaswamaiah | .
by J R Hicks | .
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by K C Mahanta | .
by L Bos | .
by B W J Mahy | .
by D Noordam | .
by S P Raychoudhuri | T K Nariani.
by K.E.K Rowson | B. W.J Mahy T.A.L Rees.
by J G Ormerod | .
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