The race for Montgomery County executive, a model for campaigning by news conference, continued apace this week with allegations that candidate Sidney Kramer deliberately distorted his record about a vote on a crucial land-zoning bill 13 years ago.

David L. Scull, who is competing against Kramer for the Democratic nomination to the top job in Montgomery government, held a news conference to denounce Kramer for "trying to confuse" voters about a vote on a measure to preserve open space and farmland in the upper part of the county.

In 1973, Kramer, then a County Council member, cosponsored legislation permitting housing lots of five acres in specially designated rural zones. Kramer's current campaign literature notes his initial support of the landmark bill, but fails to mention that he eventually voted against it. Kramer said at the time that the zoning designation would hurt home buyers shopping for moderately priced housing.

Scull pounced on the omission, calling it a "serious misrepresentation" and indicative of what he called Kramer's "pro-runaway development" views.

Kramer was out of town earlier this week. Susan Hoffman, his campaign chief, did not dispute the historical accuracy of Scull's discovery but said the broader " accusation was "flimsy at best."