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	1.	Calo paryāvaraṇ ko surakṣita kareṁ चलो पर्यावरण को सुरक्षित करें / ओंकार नाथ त्रिपाठी Tripāṭhī, Oṁkāra Nātha, Dr., by त्रिपाठी, ओंकार नाथ, डॉ, 1959- Material type: Text; Format: print ; Literary form: Not fiction ; Audience: General; Language: Hindi Language: Hindi Publication details: नई दिल्ली : वर्ल्ड टेक्नोलॉजिस, 2018 Availability: Items available for loan: National Library of India (1)Call number: H 363.73 T 841 cp. Place hold Request article Save to lists
	2.	Khagola vijñāna aūra hamārī pṛithvī खगोल विज्ञान और हमारी पृथ्वी / ओंकार नाथ त्रिपाठी Tripāṭhī, Oṁkāranātha, Dr., by त्रिपाठी, ओंकार नाथ, डॉ, 1959- Material type: Text; Format: print ; Literary form: Not fiction ; Audience: General; Language: Hindi Language: Hindi Publication details: नई दिल्ली : ट्राई कलर बुक्स, 2018 Availability: Items available for loan: National Library of India (1)Call number: H 525 T 841 kha. Place hold Request article Save to lists

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