Use of a Mail Questionnaire von Longworth, Donald S.

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Critique of Attempts to Evaluate Marriage Teaching von Longworth, Donald S.

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Certification of Teachers of Family Living: A Proposal von Longworth, Donald S.

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Use of a Mail Questionnaire von Longworth, Donald S

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Considerations in the Use of Instruments for the Selection of Family Life Educatiors von Longworth, Donald S

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George and Wilding, "Motherless Families" (Book Review) von Longworth, Donald S

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Motherless Families von Longworth, Donald S.

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James H. S. Bossard and Eleanor Stoker Boll, ONE MARRIAGE TWO FAITHS (Book Review) von Longworth, Donald S

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The Annals von Longworth, Donald S.

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CH616538 von DONALD LONGWORTH MANSFIELD, WALTER RAY WOODWARD

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ROTOR FOR STEPPING MOTOR von DONALD LONGWORTH MANSFIELD, WALTER RAY WOODWARD

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ROTOR FOR STEPPING MOTOR von MANSFIELD, DONALD LONGWORTH, WOODWARD, WALTER RAY

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Marriage and Family in the Modern World von Longworth, Donald S.

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MECCANISMO GENERATORE D'ONDA DI SOLLECITAZIONE UNIVERSALE von SCOTT GIFFORD PENNINGTON, CARLSON JOHN HOWARD, MANSFIELD DONALD LONGWORTH

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Strain wave generating mechanism von DONALD LONGWORTH MANSFIELD, GIFFORD PENNINGTON SCOTT, JOHN HOWARD CARLSON

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UNIVERSAL WAVE GENERATOR von DONALD LONGWORTH MANSFIELD, GIFFORD PENNINGTON SCOTT, JOHN HOWARD CARLSON

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UNIVERSAL BOELGEGENERATOR von SCOTT GIFFORD PENNINGTON, CARLSON JOHN HOWARD, MANSFIELD DONALD LONGWORTH

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MECCANISMO GENERATORE D'ONDA DI SOLLECITAZIONE UNIVERSALE von DONALD LONGWORTH MANSFIELD, GIFFORD PENNINGTON SCOTT, JOHN HOWARD CARLSON

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Marriage and the Family von Longworth, Donald S.

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One Marriage Two Faiths von Longworth, Donald S.

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