%0 Report %D 1974 %T Reconstruction of Past Climatic Variability (A Progress Report) 1 January through 30 June 1974 %A Fritts, H. %K ARPA %K climatic variability %K dendroclimatology %K past climate %K reconstruction %K tree rings %I Laboratory of Tree-Ring Research %C Tucson %G English %N 1 January through 30 June 1974 %9 Fourth Semi-Annual Technical Report %0 Report %D 1974 %T Reconstruction of Past Climatic Variability (A Progress Report) 30 June through 31 December 1974 %A Fritts, H. %K ARPA %K climatic variability %K dendroclimatology %K past climate %K reconstruction %K tree rings %I Laboratory of Tree-Ring Research %C Tucson %G English %N 30 June through 31 December 1974 %9 Fifth Semi-Annual Technical Report