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| ON SOUTH AMERICAN PAPILIONACEAE | AMSHOFF,G.J.H. | € 15.00 |
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| ON THE ABSORPTION OF NITRATE BY MAIZE IN WATER CULTURE | HONERT,T.H. v.d. / HOOYMANS,J.J.M. | € 5.00 |
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| On the age and immigration of the Icelandic flora. | Steindórsson, S. | € 25.00 |
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| ON THE BIOLOGY AND ANATOMY OF SOME TROPICAL LEAF JOINTS | FUNKE,G.L. | € 8.00 |
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| ON THE ECOLOGY OF SOME HALOPHYTES../ CONTR. TO THE KNOWLEDGE OF CYANOGENESIS../ VARIATION IN LIFE-HISTORY..PLANTAGO MAJOR/ ECOPH. STUDIES ON GROWTH ..OF THE AQUATIC MACROPHYTE 4 vols | ROZEMA,JELTE/ VALEN,F./ LOTZ,L.A.P./ BEST,P.H. | € 40.00 |
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| ON TWO SPECIES OF UMBELLOSPAERA; a new marine coccolithophorid genus | MARKALI,J. / PAASCHE,Ey. | € 5.00 |
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