Considerations 
Prices for printing paper went up for 100 % within 
less than two years. Increasing oosts diminished the num- 
ber of copies sold not only to individuals but to libra- 
ries as well. 
Our age of social security promotes free education 
providing also access for students to the most important 
literature without the necessity of buying it themselves. 
Graduates, then, unfortunately, are not used to spend mo- 
ney for learning something and they will hardly do it for 
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their professional education neither, thus for pe riodi - 
cals. No wonder that it is increasingly difficult to gain 
young colleagues as subscribers. 
Copying machines are the tomb-diggers of periodicals. 
Instead of having, for instance, 30 subscribers in one of 
he b er organisations, all of them use nowadays that 
one © mich is paid for by their office and produce 
Xerox prints of those articles they are interested in. 
Already some 30 % of all scientific material as read by 
engineers has been copied /1/. As an example it might be 
mentioned that one photogrammetric institution produced 
3 million Xerox prints in one year for students and colle- 
(yr oc 
agues. 
In some countries authors not only have to elaborate 
on research work and on writing manuscripts but even mus. 
pay page-charges for having their article printed in a 
periodical. 
Enormous amounts of money are sometimes involved in 
research work. It has to be considered as a very bad si- 
tuation if no possibilities would be available for publi- 
cation of the results. 
On the other hand, the question should be raised 
whether it is economically justified to publish soienti- 
fic treatments in full length in periodicals, as the rea- 
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