reference cards regarding languages, science, mathematics, geography, medicine, geometry, logarithms, trigonometry, metric/English conversion, periodic table, diet, first aid, baby care, pregnancy, health, telephone operations, grammar, and sports

'aid':18 'babi':19 'card':2 'care':20 'convers':13 'diet':16 'first':17 'geographi':7 'geometri':9 'grammar':25 'health':22 'languag':4 'logarithm':10 'mathemat':6 'medicin':8 'metric/english':12 'oper':24 'period':14 'pregnanc':21 'refer':1 'regard':3 'scienc':5 'sport':27 'tabl':15 'telephon':23 'trigonometri':11

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