Hellwig, Z. (1963). Linear Regression and its Application to Economics. ELSEVIER.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHellwig, Zdzisław. Linear Regression and Its Application to Economics. ELSEVIER, 1963.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHellwig, Zdzisław. Linear Regression and Its Application to Economics. ELSEVIER, 1963.
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