A herbáriumról (gondolatok és jótanácsok) von Felföldy, Lajos

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Detection of phosphine: new aspects of the phosphorus cycle in the hydrosphere von Dévai, István, Felföldy, Lajos, Wittner, Ilona, Plósz, Sándor

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Effect of Cyanide on Algal Photosynthesis at Different pH von Felföldy, Lajos J. M.

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A TWO-CUBIC-METER ALGA PLANT AT TIHANY von Felfoldy, Lajos

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PROCESS FOR PROTECTING LAKES AGAINST EUTROPHIZATION CAUSED BY SUBSOIL WATER von JAKAB, SANDOR, PLOSZ, SANDOR, FELFOLDY, LAJOS

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METHOD FOR PROTECTING LAKES AGAINST EUTROPHIZATION CAUSED BY SUBSOIL WATER A DAM IS BUILT ON A LAYER BELOW THE BOTTOM OF A LAKE, I.E. ON THE IMPERVIOUS LAYER, TO STEM von LAJOS FELFOLDY, SANDOR PLOSZ, SANDOR JAKAB

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PROCESS FOR PROTECTING LAKES AGAINST EUTROPHIZATION CAUSED BY SUBSOIL WATER von JAKAB, SANDOR, PLOSZ, SANDOR, FELFOLDY, LAJOS

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APPARATUS FOR LIFTING OVER WATER PARTICULARLYH PRECIPITATE OR/AND SEWAGE AND METHOD FOR BUILDING ENGINEERING STRUCTURE PARTICULARLY LIFTING-OVER SHAFT BEING UNDER TERRAIN von CSERE,ISTVAN,HU, ADAM,ZOLTAN,HU, VIGH,ZSOLT,HU, BENKE,ISTVAN,HU, HORVATH,ISTVAN,HU, LEGRADI,ZOLTANNE,HU, TOLNAI,LASZLO,HU, FELFOELDY,SANDORNE,HU, BOROSS,LASZLO,HU, MITS,LAJOS,HU, ERENYI,BALAZS,HU, KNOR,AKOS,HU

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