ppc Sr294/G Ca
pLititiipit tt tt itil te ee ee
JIASONDIJEFMAMJJASONDIVFMAMJJASONDIVFMAMJJASONDIVEMAMG J
1954
1955
1956
1957
1958
puc Sr9YG Ca
Fig. 9— Monthly Sr®® levels in New York City liquid milk.
ELE EEV ETE TEEPE EI
1
AMJJASOND]JV FMAMJJASONDIVFMAMJJASONO|LUFMAMJJASOND
1954
1955
1956
1957
Fig. 10— Monthly Srlevels in Perry, N. Y., powdered milk.
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