1951 Conversion of Hollerith punched card machines for use of un-punched cards

POLLAK, L.W., 1951. Conversion of Hollerith punched card machines for use of un-punched cards. Arch. f. Met., Geophysik u. Bioklim., Wien, Serie B, Band II, 1951, pp. 462-467).

1951 On the Frequency of Cyclones over the North Atlantic Related to the Sunspot Cycle

POLLAK, L.W. and P. G. TEDDE, 1951. On the Frequency of Cyclones over the North Atlantic Related to the Sunspot Cycle. (Arch. f. Met., Geophysik u. Bioklim., Wien, Serie A, Band IV, 1951, pp. 98-111).

1951 On the Measurement of Global Radiation Using Black and White Atmometers

O'CONNOR, T.C., 1951. On the Measurement of Global Radiation Using Black and White Atmometers. (Geofisica Pura e Applicata, Milano, Vol. 30, 1951/I, pp. 130-136).