op did I p.142 (= Di...

http://lila-erc.eu/data/lexicalResources/NLW/id/attestation/43162 <http://www.w3.org/nl/lemon/frac#Attestation>

op did I p.142 (= Di... 
op did I p.142 (= Didactica magna, CAP. XXIV. Pietatis instillandae, Methodus). 

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