1. The acidity of Scandinavian precipitation;Barrett;Tellus,1955
2. Trajectories: isobaric, isentropic and actual;Danielsen;J. Meteor.,1961
3. Horizontal diffusion in the atmosphere as determined by geostrophic trajectories;Durst;J. Fluid Mech.,1959
4. Godske, C. L. et al. 1957. Dynamic meteorology and weather forecasting Am. Met. Soc. & Carnegie Inst. of Washington. 800 pp.