Published in Phegea, in 1988, in volume 16, issue 1, pages 1-9

Published in Phegea, in 1988, in volume 16, issue 1, pages 11-12

Published in Phegea, in 1988, in volume 16, issue 1, pages 13-17

Published in Phegea, in 1988, in volume 16, issue 1, pages 19-21

Published in Phegea, in 1988, in volume 16, issue 1, pages 23-26

Published in Phegea, in 1988, in volume 16, issue 1, pages 27-30

Published in Phegea, in 1988, in volume 16, issue 2, pages 33-42

Published in Phegea, in 1988, in volume 16, issue 2, pages 43-49

Published in Phegea, in 1988, in volume 16, issue 2, pages 51-58

Published in Phegea, in 1988, in volume 16, issue 2, pages 59-60

Published in Phegea, in 1988, in volume 16, issue 2, pages 61-63

Published in Phegea, in 1988, in volume 16, issue 3, pages 65-76

Published in Phegea, in 1988, in volume 16, issue 3, pages 77-79

Published in Phegea, in 1988, in volume 16, issue 3, pages 93-98

Published in Phegea, in 1988, in volume 16, issue 3, pages 99-101

Published in Phegea, in 1988, in volume 16, issue 3, pages 102

Published in Phegea, in 1988, in volume 16, issue 4, pages 105-113

Published in Phegea, in 1988, in volume 16, issue 4, pages 115-118

Published in Phegea, in 1988, in volume 16, issue 4, pages 119-121

Published in Phegea, in 1988, in volume 16, issue 4, pages 123-127

Published in Phegea, in 1988, in volume 16, issue 4, pages 129-134

Published in Phegea, in 1988, in volume 16, issue 4, pages 135-143

Published in Phegea, in 1988, in volume 16, issue 4, pages 145-148