The bibl iogra hy includes papers i'n all fields of photosynthesis research, - from stu- dies of model biochemical and biophysical systems of the photosynthesis mech, anism to primary production studi'ed by the so-called growth analysis. In add, iti'on to papers devoted entirely to photosynthesis, papers on other topics are included if they con- tain data on photosynthetic activity, photorespiration, chloroplast structure, chlo- rophyll and carotenoid synthesis and destruction, etc., or j'f tney contain valuaBle methodological information (measurement of selected environmental factors, leaf area, etc. ). In many branches i't has been very difHcult to define tne I imits of in- terest for photosynthesis researchers. This problem has arisen e. g. in topics deal- ing with the transport of gases, where - in addition to tee papers on C02 transfer some papers on water vapour transfer are i'ncluded, these being of general appl ication. On the other hand, many papers deal ing w'ith the anatomy and physiology of stomata have been omitted, if the aspect of carBon dioxide or water vapour exchange has not been discussed. This volume contains references to papers published in the year 1972, and, si- milarly to Vol . 2, also addenda including references published in the preceding pe- riod (i. e. 1966 - 1971). The numbers of these additional references are label led with an aster i sk in the list of references as we I I as in indexes.