11. Hallert, B.: 
A new method for the determination of the distortion 
; 
12. 
and the inner orientation of cameras and projectors. 
Photogrammetria XI:3 (1954—55) or ISP Archives 
1956. 
The grid method and the y-parallax method etc. 
Svensk Lantmateritidskrift 1956: 2—3 or ISP Archives 
1956. 
13. 
Results of Practical Investigations into the Accuracy of 
Aerial and Terrestrial Photographs. 
Svensk Lantmateritidskrift 1960:3 or ISP Archives 1960. 
14. 
Fotogrammetri. Norstedts, Stockholm 1964. 
15. 
Fundamental problems in photogrammetry. 
Working group on fundamental problems, Comm. II. 
ISP Archives 1964. 
16. Henriksson, C-O: lodine 125 as a radiation source in odontological radio- 
17. Harley, I. A.: 
logy. Acta Radiol. Suppl. In press, 1967. 
The calibration of cameras for non-topographical pho 
togrammetry. 
ISP Comm. V. Journal of the Japan Society of photo 
grammetry, Voi 2, 1966. 
18. Hollender, L.: 
Determining the elements of the interior orientation in 
roentgenography. 
Acta radiologica supp. 230, Stockholm 1964. 
19. Hubeny, K.: 
Zur Bestimmung der Elemente der inneren Orientier 
ung an Nahkammern. 
Photographische Korrespondenz, 86. Band, Nr. 11 bis 12. 
1950. 
20. Kaasila, P.: 
Determination of interior and exterior orientation of 
projectors in A7 and A8. Personal communication. 
21. Kendall, M. G. 
and Stuart, A.: 
The Advanced Theory of Statistics. Griffin, London 
1961. 
22. Roelofs, R.: 
Distortion, principal point, point of symmetry and cali 
brated principal point. 
Photogrammetria, nr 3, 1950—1951. 
23. Roos, W.: 
On the definition of fundamental concepts in photo 
grammetry. Photogrammetria 1951—52 nr 3. 
88