Chap., §

 1    2,  15|       will be more skilled and productive, as well as careful controls
 2    3,  22|    there began a difficult but productive transition towards more
 3    4,  31|  increasingly important as the productive factor both of non-material
 4    4,  31| becomes ever more fruitful and productive to the extent that people
 5    4,  31|      more knowledgeable of the productive potentialities of the earth
 6    4,  32|        and the combinations of productive factors most adapted to
 7    4,  32|        goal. Organizing such a productive effort, planning its duration
 8    4,  32|        to discover the earth's productive potential and the many different
 9    4,  33| humanly dignified way within a productive system in which work is
10    4,  35|        profit, this means that productive factors have been properly
11    4,  36|    rather than another, in one productive sector rather than another,