1. The nature and types of climatic classification;Borgel,1969
2. Toward a new climatic regionalization of the contiguous United states;Willmott,1977
3. A global classification of solar radiation;Terjung;Solar Energy,1970
4. Reference Manual: Card Deck 480 Solar Radiation-Summary of the Day;National Weather Records Center,1967
5. Climatic normals are inefficient;Court;J. Aust. Met. Ass.,1976